Merge branch 'main' into debian-stripe

2026-01-18 16:17:26 +01:00 · 2025-08-07 15:34:54 +02:00
parent 5ccc131e73 eac523dcf9
commit 32fa8d43c1
105 changed files with 11828 additions and 1271 deletions
--- a/server/config.go
+++ b/server/config.go
@@ -11,6 +11,8 @@ import (
 // Defines default config settings (excluding limits, see below)
 const (
 	DefaultListenHTTP                           = ":80"
+	DefaultConfigFile                           = "/etc/ntfy/server.yml"
+	DefaultTemplateDir                          = "/etc/ntfy/templates"
 	DefaultCacheDuration                        = 12 * time.Hour
 	DefaultCacheBatchTimeout                    = time.Duration(0)
 	DefaultKeepaliveInterval                    = 45 * time.Second // Not too frequently to save battery (Android read timeout used to be 77s!)
@@ -61,6 +63,8 @@ const (
 	DefaultVisitorAuthFailureLimitReplenish     = time.Minute
 	DefaultVisitorAttachmentTotalSizeLimit      = 100 * 1024 * 1024 // 100 MB
 	DefaultVisitorAttachmentDailyBandwidthLimit = 500 * 1024 * 1024 // 500 MB
+	DefaultVisitorPrefixBitsIPv4                = 32                // Use the entire IPv4 address for rate limiting
+	DefaultVisitorPrefixBitsIPv6                = 64                // Use /64 for IPv6 rate limiting
 )

 var (
@@ -91,12 +95,16 @@ type Config struct {
 	AuthFile                             string
 	AuthStartupQueries                   string
 	AuthDefault                          user.Permission
+	AuthUsers                            []*user.User
+	AuthAccess                           map[string][]*user.Grant
+	AuthTokens                           map[string][]*user.Token
 	AuthBcryptCost                       int
 	AuthStatsQueueWriterInterval         time.Duration
 	AttachmentCacheDir                   string
 	AttachmentTotalSizeLimit             int64
 	AttachmentFileSizeLimit              int64
 	AttachmentExpiryDuration             time.Duration
+	TemplateDir                          string // Directory to load named templates from
 	KeepaliveInterval                    time.Duration
 	ManagerInterval                      time.Duration
 	DisallowedTopics                     []string
@@ -133,7 +141,7 @@ type Config struct {
 	VisitorAttachmentDailyBandwidthLimit int64
 	VisitorRequestLimitBurst             int
 	VisitorRequestLimitReplenish         time.Duration
-	VisitorRequestExemptIPAddrs          []netip.Prefix
+	VisitorRequestExemptPrefixes         []netip.Prefix
 	VisitorMessageDailyLimit             int
 	VisitorEmailLimitBurst               int
 	VisitorEmailLimitReplenish           time.Duration
@@ -141,11 +149,13 @@ type Config struct {
 	VisitorAccountCreationLimitReplenish time.Duration
 	VisitorAuthFailureLimitBurst         int
 	VisitorAuthFailureLimitReplenish     time.Duration
-	VisitorStatsResetTime                time.Time // Time of the day at which to reset visitor stats
-	VisitorSubscriberRateLimiting        bool      // Enable subscriber-based rate limiting for UnifiedPush topics
-	BehindProxy                          bool      // If true, the server will trust the proxy client IP header to determine the client IP address
-	ProxyForwardedHeader                 string    // The header field to read the real/client IP address from, if BehindProxy is true, defaults to "X-Forwarded-For"
-	ProxyTrustedAddresses                []string  // List of trusted proxy addresses that will be stripped from the Forwarded header if BehindProxy is true
+	VisitorStatsResetTime                time.Time      // Time of the day at which to reset visitor stats
+	VisitorSubscriberRateLimiting        bool           // Enable subscriber-based rate limiting for UnifiedPush topics
+	VisitorPrefixBitsIPv4                int            // Number of bits for IPv4 rate limiting (default: 32)
+	VisitorPrefixBitsIPv6                int            // Number of bits for IPv6 rate limiting (default: 64)
+	BehindProxy                          bool           // If true, the server will trust the proxy client IP header to determine the client IP address (IPv4 and IPv6 supported)
+	ProxyForwardedHeader                 string         // The header field to read the real/client IP address from, if BehindProxy is true, defaults to "X-Forwarded-For" (IPv4 and IPv6 supported)
+	ProxyTrustedPrefixes                 []netip.Prefix // List of trusted proxy networks (IPv4 or IPv6) that will be stripped from the Forwarded header if BehindProxy is true
 	StripeSecretKey                      string
 	StripeWebhookKey                     string
 	StripePriceCacheDuration             time.Duration
@@ -155,7 +165,6 @@ type Config struct {
 	EnableReservations                   bool // Allow users with role "user" to own/reserve topics
 	EnableMetrics                        bool
 	AccessControlAllowOrigin             string // CORS header field to restrict access from web clients
-	Version                              string // injected by App
 	WebPushPrivateKey                    string
 	WebPushPublicKey                     string
 	WebPushFile                          string
@@ -163,12 +172,13 @@ type Config struct {
 	WebPushStartupQueries                string
 	WebPushExpiryDuration                time.Duration
 	WebPushExpiryWarningDuration         time.Duration
+	Version                              string // injected by App
 }

 // NewConfig instantiates a default new server config
 func NewConfig() *Config {
 	return &Config{
-		File:                                 "", // Only used for testing
+		File:                                 DefaultConfigFile, // Only used for testing
 		BaseURL:                              "",
 		ListenHTTP:                           DefaultListenHTTP,
 		ListenHTTPS:                          "",
@@ -191,6 +201,7 @@ func NewConfig() *Config {
 		AttachmentTotalSizeLimit:             DefaultAttachmentTotalSizeLimit,
 		AttachmentFileSizeLimit:              DefaultAttachmentFileSizeLimit,
 		AttachmentExpiryDuration:             DefaultAttachmentExpiryDuration,
+		TemplateDir:                          DefaultTemplateDir,
 		KeepaliveInterval:                    DefaultKeepaliveInterval,
 		ManagerInterval:                      DefaultManagerInterval,
 		DisallowedTopics:                     DefaultDisallowedTopics,
@@ -220,11 +231,12 @@ func NewConfig() *Config {
 		TotalTopicLimit:                      DefaultTotalTopicLimit,
 		TotalAttachmentSizeLimit:             0,
 		VisitorSubscriptionLimit:             DefaultVisitorSubscriptionLimit,
+		VisitorSubscriberRateLimiting:        false,
 		VisitorAttachmentTotalSizeLimit:      DefaultVisitorAttachmentTotalSizeLimit,
 		VisitorAttachmentDailyBandwidthLimit: DefaultVisitorAttachmentDailyBandwidthLimit,
 		VisitorRequestLimitBurst:             DefaultVisitorRequestLimitBurst,
 		VisitorRequestLimitReplenish:         DefaultVisitorRequestLimitReplenish,
-		VisitorRequestExemptIPAddrs:          make([]netip.Prefix, 0),
+		VisitorRequestExemptPrefixes:         make([]netip.Prefix, 0),
 		VisitorMessageDailyLimit:             DefaultVisitorMessageDailyLimit,
 		VisitorEmailLimitBurst:               DefaultVisitorEmailLimitBurst,
 		VisitorEmailLimitReplenish:           DefaultVisitorEmailLimitReplenish,
@@ -233,9 +245,10 @@ func NewConfig() *Config {
 		VisitorAuthFailureLimitBurst:         DefaultVisitorAuthFailureLimitBurst,
 		VisitorAuthFailureLimitReplenish:     DefaultVisitorAuthFailureLimitReplenish,
 		VisitorStatsResetTime:                DefaultVisitorStatsResetTime,
-		VisitorSubscriberRateLimiting:        false,
-		BehindProxy:                          false,             // If true, the server will trust the proxy client IP header to determine the client IP address
-		ProxyForwardedHeader:                 "X-Forwarded-For", // Default header for reverse proxy client IPs
+		VisitorPrefixBitsIPv4:                DefaultVisitorPrefixBitsIPv4, // Default: use full IPv4 address
+		VisitorPrefixBitsIPv6:                DefaultVisitorPrefixBitsIPv6, // Default: use /64 for IPv6
+		BehindProxy:                          false,                        // If true, the server will trust the proxy client IP header to determine the client IP address
+		ProxyForwardedHeader:                 "X-Forwarded-For",            // Default header for reverse proxy client IPs
 		StripeSecretKey:                      "",
 		StripeWebhookKey:                     "",
 		StripePriceCacheDuration:             DefaultStripePriceCacheDuration,
--- a/server/errors.go
+++ b/server/errors.go
@@ -123,6 +123,8 @@ var (
 	errHTTPBadRequestTemplateDisallowedFunctionCalls = &errHTTP{40044, http.StatusBadRequest, "invalid request: template contains disallowed function calls, e.g. template, call, or define", "https://ntfy.sh/docs/publish/#message-templating", nil}
 	errHTTPBadRequestTemplateExecuteFailed           = &errHTTP{40045, http.StatusBadRequest, "invalid request: template execution failed", "https://ntfy.sh/docs/publish/#message-templating", nil}
 	errHTTPBadRequestInvalidUsername                 = &errHTTP{40046, http.StatusBadRequest, "invalid request: invalid username", "", nil}
+	errHTTPBadRequestTemplateFileNotFound            = &errHTTP{40047, http.StatusBadRequest, "invalid request: template file not found", "https://ntfy.sh/docs/publish/#message-templating", nil}
+	errHTTPBadRequestTemplateFileInvalid             = &errHTTP{40048, http.StatusBadRequest, "invalid request: template file invalid", "https://ntfy.sh/docs/publish/#message-templating", nil}
 	errHTTPNotFound                                  = &errHTTP{40401, http.StatusNotFound, "page not found", "", nil}
 	errHTTPUnauthorized                              = &errHTTP{40101, http.StatusUnauthorized, "unauthorized", "https://ntfy.sh/docs/publish/#authentication", nil}
 	errHTTPForbidden                                 = &errHTTP{40301, http.StatusForbidden, "forbidden", "https://ntfy.sh/docs/publish/#authentication", nil}
@@ -130,6 +132,8 @@ var (
 	errHTTPConflictTopicReserved                     = &errHTTP{40902, http.StatusConflict, "conflict: access control entry for topic or topic pattern already exists", "", nil}
 	errHTTPConflictSubscriptionExists                = &errHTTP{40903, http.StatusConflict, "conflict: topic subscription already exists", "", nil}
 	errHTTPConflictPhoneNumberExists                 = &errHTTP{40904, http.StatusConflict, "conflict: phone number already exists", "", nil}
+	errHTTPConflictProvisionedUserChange             = &errHTTP{40905, http.StatusConflict, "conflict: cannot change or delete provisioned user", "", nil}
+	errHTTPConflictProvisionedTokenChange            = &errHTTP{40906, http.StatusConflict, "conflict: cannot change or delete provisioned token", "", nil}
 	errHTTPGonePhoneVerificationExpired              = &errHTTP{41001, http.StatusGone, "phone number verification expired or does not exist", "", nil}
 	errHTTPEntityTooLargeAttachment                  = &errHTTP{41301, http.StatusRequestEntityTooLarge, "attachment too large, or bandwidth limit reached", "https://ntfy.sh/docs/publish/#limitations", nil}
 	errHTTPEntityTooLargeMatrixRequest               = &errHTTP{41302, http.StatusRequestEntityTooLarge, "Matrix request is larger than the max allowed length", "", nil}
--- a/server/message_cache.go
+++ b/server/message_cache.go
@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"net/netip"
+	"path/filepath"
 	"strings"
 	"time"

@@ -286,6 +287,12 @@ type messageCache struct {

 // newSqliteCache creates a SQLite file-backed cache
 func newSqliteCache(filename, startupQueries string, cacheDuration time.Duration, batchSize int, batchTimeout time.Duration, nop bool) (*messageCache, error) {
+	// Check the parent directory of the database file (makes for friendly error messages)
+	parentDir := filepath.Dir(filename)
+	if !util.FileExists(parentDir) {
+		return nil, fmt.Errorf("cache database directory %s does not exist or is not accessible", parentDir)
+	}
+	// Open database
 	db, err := sql.Open("sqlite3", filename)
 	if err != nil {
 		return nil, err
--- a/server/server.go
+++ b/server/server.go
@@ -9,6 +9,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"gopkg.in/yaml.v2"
 	"io"
 	"net"
 	"net/http"
@@ -34,6 +35,7 @@ import (
 	"heckel.io/ntfy/v2/log"
 	"heckel.io/ntfy/v2/user"
 	"heckel.io/ntfy/v2/util"
+	"heckel.io/ntfy/v2/util/sprig"
 )

 // Server is the main server, providing the UI and API for ntfy
@@ -120,6 +122,15 @@ var (
 	//go:embed docs
 	docsStaticFs     embed.FS
 	docsStaticCached = &util.CachingEmbedFS{ModTime: time.Now(), FS: docsStaticFs}
+
+	//go:embed templates
+	templatesFs  embed.FS // Contains template config files (e.g. grafana.yml, github.yml, ...)
+	templatesDir = "templates"
+
+	// templateDisallowedRegex tests a template for disallowed expressions. While not really dangerous, they
+	// are not useful, and seem potentially troublesome.
+	templateDisallowedRegex = regexp.MustCompile(`(?m)\{\{-?\s*(call|template|define)\b`)
+	templateNameRegex       = regexp.MustCompile(`^[-_A-Za-z0-9]+$`)
 )

 const (
@@ -129,17 +140,13 @@ const (
 	newMessageBody           = "New message"             // Used in poll requests as generic message
 	defaultAttachmentMessage = "You received a file: %s" // Used if message body is empty, and there is an attachment
 	encodingBase64           = "base64"                  // Used mainly for binary UnifiedPush messages
-	jsonBodyBytesLimit       = 32768                     // Max number of bytes for a request bodys (unless MessageLimit is higher)
+	jsonBodyBytesLimit       = 131072                    // Max number of bytes for a request bodys (unless MessageLimit is higher)
 	unifiedPushTopicPrefix   = "up"                      // Temporarily, we rate limit all "up*" topics based on the subscriber
 	unifiedPushTopicLength   = 14                        // Length of UnifiedPush topics, including the "up" part
 	messagesHistoryMax       = 10                        // Number of message count values to keep in memory
-	templateMaxExecutionTime = 100 * time.Millisecond
-)
-
-var (
-	// templateDisallowedRegex tests a template for disallowed expressions. While not really dangerous, they
-	// are not useful, and seem potentially troublesome.
-	templateDisallowedRegex = regexp.MustCompile(`(?m)\{\{-?\s*(call|template|define)\b`)
+	templateMaxExecutionTime = 100 * time.Millisecond    // Maximum time a template can take to execute, used to prevent DoS attacks
+	templateMaxOutputBytes   = 1024 * 1024               // Maximum number of bytes a template can output, used to prevent DoS attacks
+	templateFileExtension    = ".yml"                    // Template files must end with this extension
 )

 // WebSocket constants
@@ -189,7 +196,18 @@ func New(conf *Config) (*Server, error) {
 	}
 	var userManager *user.Manager
 	if conf.AuthFile != "" {
-		userManager, err = user.NewManager(conf.AuthFile, conf.AuthStartupQueries, conf.AuthDefault, conf.AuthBcryptCost, conf.AuthStatsQueueWriterInterval)
+		authConfig := &user.Config{
+			Filename:            conf.AuthFile,
+			StartupQueries:      conf.AuthStartupQueries,
+			DefaultAccess:       conf.AuthDefault,
+			ProvisionEnabled:    true, // Enable provisioning of users and access
+			Users:               conf.AuthUsers,
+			Access:              conf.AuthAccess,
+			Tokens:              conf.AuthTokens,
+			BcryptCost:          conf.AuthBcryptCost,
+			QueueWriterInterval: conf.AuthStatsQueueWriterInterval,
+		}
+		userManager, err = user.NewManager(authConfig)
 		if err != nil {
 			return nil, err
 		}
@@ -760,7 +778,7 @@ func (s *Server) handlePublishInternal(r *http.Request, v *visitor) (*message, e
 		// the subscription as invalid if any 400-499 code (except 429/408) is returned.
 		// See https://github.com/mastodon/mastodon/blob/730bb3e211a84a2f30e3e2bbeae3f77149824a68/app/workers/web/push_notification_worker.rb#L35-L46
 		return nil, errHTTPInsufficientStorageUnifiedPush.With(t)
-	} else if !util.ContainsIP(s.config.VisitorRequestExemptIPAddrs, v.ip) && !vrate.MessageAllowed() {
+	} else if !util.ContainsIP(s.config.VisitorRequestExemptPrefixes, v.ip) && !vrate.MessageAllowed() {
 		return nil, errHTTPTooManyRequestsLimitMessages.With(t)
 	} else if email != "" && !vrate.EmailAllowed() {
 		return nil, errHTTPTooManyRequestsLimitEmails.With(t)
@@ -936,7 +954,7 @@ func (s *Server) forwardPollRequest(v *visitor, m *message) {
 	}
 }

-func (s *Server) parsePublishParams(r *http.Request, m *message) (cache bool, firebase bool, email, call string, template bool, unifiedpush bool, err *errHTTP) {
+func (s *Server) parsePublishParams(r *http.Request, m *message) (cache bool, firebase bool, email, call string, template templateMode, unifiedpush bool, err *errHTTP) {
 	cache = readBoolParam(r, true, "x-cache", "cache")
 	firebase = readBoolParam(r, true, "x-firebase", "firebase")
 	m.Title = readParam(r, "x-title", "title", "t")
@@ -952,7 +970,7 @@ func (s *Server) parsePublishParams(r *http.Request, m *message) (cache bool, fi
 	}
 	if attach != "" {
 		if !urlRegex.MatchString(attach) {
-			return false, false, "", "", false, false, errHTTPBadRequestAttachmentURLInvalid
+			return false, false, "", "", "", false, errHTTPBadRequestAttachmentURLInvalid
 		}
 		m.Attachment.URL = attach
 		if m.Attachment.Name == "" {
@@ -970,48 +988,53 @@ func (s *Server) parsePublishParams(r *http.Request, m *message) (cache bool, fi
 	}
 	if icon != "" {
 		if !urlRegex.MatchString(icon) {
-			return false, false, "", "", false, false, errHTTPBadRequestIconURLInvalid
+			return false, false, "", "", "", false, errHTTPBadRequestIconURLInvalid
 		}
 		m.Icon = icon
 	}
 	email = readParam(r, "x-email", "x-e-mail", "email", "e-mail", "mail", "e")
 	if s.smtpSender == nil && email != "" {
-		return false, false, "", "", false, false, errHTTPBadRequestEmailDisabled
+		return false, false, "", "", "", false, errHTTPBadRequestEmailDisabled
 	}
 	call = readParam(r, "x-call", "call")
 	if call != "" && (s.config.TwilioAccount == "" || s.userManager == nil) {
-		return false, false, "", "", false, false, errHTTPBadRequestPhoneCallsDisabled
+		return false, false, "", "", "", false, errHTTPBadRequestPhoneCallsDisabled
 	} else if call != "" && !isBoolValue(call) && !phoneNumberRegex.MatchString(call) {
-		return false, false, "", "", false, false, errHTTPBadRequestPhoneNumberInvalid
+		return false, false, "", "", "", false, errHTTPBadRequestPhoneNumberInvalid
+	}
+	template = templateMode(readParam(r, "x-template", "template", "tpl"))
+	messageStr := readParam(r, "x-message", "message", "m")
+	if !template.InlineMode() {
+		// Convert "\n" to literal newline everything but inline mode
+		messageStr = strings.ReplaceAll(messageStr, "\\n", "\n")
 	}
-	messageStr := strings.ReplaceAll(readParam(r, "x-message", "message", "m"), "\\n", "\n")
 	if messageStr != "" {
 		m.Message = messageStr
 	}
 	var e error
 	m.Priority, e = util.ParsePriority(readParam(r, "x-priority", "priority", "prio", "p"))
 	if e != nil {
-		return false, false, "", "", false, false, errHTTPBadRequestPriorityInvalid
+		return false, false, "", "", "", false, errHTTPBadRequestPriorityInvalid
 	}
 	m.Tags = readCommaSeparatedParam(r, "x-tags", "tags", "tag", "ta")
 	delayStr := readParam(r, "x-delay", "delay", "x-at", "at", "x-in", "in")
 	if delayStr != "" {
 		if !cache {
-			return false, false, "", "", false, false, errHTTPBadRequestDelayNoCache
+			return false, false, "", "", "", false, errHTTPBadRequestDelayNoCache
 		}
 		if email != "" {
-			return false, false, "", "", false, false, errHTTPBadRequestDelayNoEmail // we cannot store the email address (yet)
+			return false, false, "", "", "", false, errHTTPBadRequestDelayNoEmail // we cannot store the email address (yet)
 		}
 		if call != "" {
-			return false, false, "", "", false, false, errHTTPBadRequestDelayNoCall // we cannot store the phone number (yet)
+			return false, false, "", "", "", false, errHTTPBadRequestDelayNoCall // we cannot store the phone number (yet)
 		}
 		delay, err := util.ParseFutureTime(delayStr, time.Now())
 		if err != nil {
-			return false, false, "", "", false, false, errHTTPBadRequestDelayCannotParse
+			return false, false, "", "", "", false, errHTTPBadRequestDelayCannotParse
 		} else if delay.Unix() < time.Now().Add(s.config.MessageDelayMin).Unix() {
-			return false, false, "", "", false, false, errHTTPBadRequestDelayTooSmall
+			return false, false, "", "", "", false, errHTTPBadRequestDelayTooSmall
 		} else if delay.Unix() > time.Now().Add(s.config.MessageDelayMax).Unix() {
-			return false, false, "", "", false, false, errHTTPBadRequestDelayTooLarge
+			return false, false, "", "", "", false, errHTTPBadRequestDelayTooLarge
 		}
 		m.Time = delay.Unix()
 	}
@@ -1019,14 +1042,13 @@ func (s *Server) parsePublishParams(r *http.Request, m *message) (cache bool, fi
 	if actionsStr != "" {
 		m.Actions, e = parseActions(actionsStr)
 		if e != nil {
-			return false, false, "", "", false, false, errHTTPBadRequestActionsInvalid.Wrap("%s", e.Error())
+			return false, false, "", "", "", false, errHTTPBadRequestActionsInvalid.Wrap("%s", e.Error())
 		}
 	}
 	contentType, markdown := readParam(r, "content-type", "content_type"), readBoolParam(r, false, "x-markdown", "markdown", "md")
 	if markdown || strings.ToLower(contentType) == "text/markdown" {
 		m.ContentType = "text/markdown"
 	}
-	template = readBoolParam(r, false, "x-template", "template", "tpl")
 	unifiedpush = readBoolParam(r, false, "x-unifiedpush", "unifiedpush", "up") // see GET too!
 	contentEncoding := readParam(r, "content-encoding")
 	if unifiedpush || contentEncoding == "aes128gcm" {
@@ -1058,7 +1080,7 @@ func (s *Server) parsePublishParams(r *http.Request, m *message) (cache bool, fi
 //     If file.txt is <= 4096 (message limit) and valid UTF-8, treat it as a message
 //  7. curl -T file.txt ntfy.sh/mytopic
 //     In all other cases, mostly if file.txt is > message limit, treat it as an attachment
-func (s *Server) handlePublishBody(r *http.Request, v *visitor, m *message, body *util.PeekedReadCloser, template, unifiedpush bool) error {
+func (s *Server) handlePublishBody(r *http.Request, v *visitor, m *message, body *util.PeekedReadCloser, template templateMode, unifiedpush bool) error {
 	if m.Event == pollRequestEvent { // Case 1
 		return s.handleBodyDiscard(body)
 	} else if unifiedpush {
@@ -1067,8 +1089,8 @@ func (s *Server) handlePublishBody(r *http.Request, v *visitor, m *message, body
 		return s.handleBodyAsTextMessage(m, body) // Case 3
 	} else if m.Attachment != nil && m.Attachment.Name != "" {
 		return s.handleBodyAsAttachment(r, v, m, body) // Case 4
-	} else if template {
-		return s.handleBodyAsTemplatedTextMessage(m, body) // Case 5
+	} else if template.Enabled() {
+		return s.handleBodyAsTemplatedTextMessage(m, template, body) // Case 5
 	} else if !body.LimitReached && utf8.Valid(body.PeekedBytes) {
 		return s.handleBodyAsTextMessage(m, body) // Case 6
 	}
@@ -1104,7 +1126,7 @@ func (s *Server) handleBodyAsTextMessage(m *message, body *util.PeekedReadCloser
 	return nil
 }

-func (s *Server) handleBodyAsTemplatedTextMessage(m *message, body *util.PeekedReadCloser) error {
+func (s *Server) handleBodyAsTemplatedTextMessage(m *message, template templateMode, body *util.PeekedReadCloser) error {
 	body, err := util.Peek(body, max(s.config.MessageSizeLimit, jsonBodyBytesLimit))
 	if err != nil {
 		return err
@@ -1112,19 +1134,69 @@ func (s *Server) handleBodyAsTemplatedTextMessage(m *message, body *util.PeekedR
 		return errHTTPEntityTooLargeJSONBody
 	}
 	peekedBody := strings.TrimSpace(string(body.PeekedBytes))
-	if m.Message, err = replaceTemplate(m.Message, peekedBody); err != nil {
-		return err
+	if template.FileMode() {
+		if err := s.renderTemplateFromFile(m, template.FileName(), peekedBody); err != nil {
+			return err
+		}
+	} else {
+		if err := s.renderTemplateFromParams(m, peekedBody); err != nil {
+			return err
+		}
 	}
-	if m.Title, err = replaceTemplate(m.Title, peekedBody); err != nil {
-		return err
-	}
-	if len(m.Message) > s.config.MessageSizeLimit {
+	if len(m.Title) > s.config.MessageSizeLimit || len(m.Message) > s.config.MessageSizeLimit {
 		return errHTTPBadRequestTemplateMessageTooLarge
 	}
 	return nil
 }

-func replaceTemplate(tpl string, source string) (string, error) {
+// renderTemplateFromFile transforms the JSON message body according to a template from the filesystem.
+// The template file must be in the templates directory, or in the configured template directory.
+func (s *Server) renderTemplateFromFile(m *message, templateName, peekedBody string) error {
+	if !templateNameRegex.MatchString(templateName) {
+		return errHTTPBadRequestTemplateFileNotFound
+	}
+	templateContent, _ := templatesFs.ReadFile(filepath.Join(templatesDir, templateName+templateFileExtension)) // Read from the embedded filesystem first
+	if s.config.TemplateDir != "" {
+		if b, _ := os.ReadFile(filepath.Join(s.config.TemplateDir, templateName+templateFileExtension)); len(b) > 0 {
+			templateContent = b
+		}
+	}
+	if len(templateContent) == 0 {
+		return errHTTPBadRequestTemplateFileNotFound
+	}
+	var tpl templateFile
+	if err := yaml.Unmarshal(templateContent, &tpl); err != nil {
+		return errHTTPBadRequestTemplateFileInvalid
+	}
+	var err error
+	if tpl.Message != nil {
+		if m.Message, err = s.renderTemplate(*tpl.Message, peekedBody); err != nil {
+			return err
+		}
+	}
+	if tpl.Title != nil {
+		if m.Title, err = s.renderTemplate(*tpl.Title, peekedBody); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// renderTemplateFromParams transforms the JSON message body according to the inline template in the
+// message and title parameters.
+func (s *Server) renderTemplateFromParams(m *message, peekedBody string) error {
+	var err error
+	if m.Message, err = s.renderTemplate(m.Message, peekedBody); err != nil {
+		return err
+	}
+	if m.Title, err = s.renderTemplate(m.Title, peekedBody); err != nil {
+		return err
+	}
+	return nil
+}
+
+// renderTemplate renders a template with the given JSON source data.
+func (s *Server) renderTemplate(tpl string, source string) (string, error) {
 	if templateDisallowedRegex.MatchString(tpl) {
 		return "", errHTTPBadRequestTemplateDisallowedFunctionCalls
 	}
@@ -1132,15 +1204,16 @@ func replaceTemplate(tpl string, source string) (string, error) {
 	if err := json.Unmarshal([]byte(source), &data); err != nil {
 		return "", errHTTPBadRequestTemplateMessageNotJSON
 	}
-	t, err := template.New("").Parse(tpl)
+	t, err := template.New("").Funcs(sprig.TxtFuncMap()).Parse(tpl)
 	if err != nil {
-		return "", errHTTPBadRequestTemplateInvalid
+		return "", errHTTPBadRequestTemplateInvalid.Wrap("%s", err.Error())
 	}
 	var buf bytes.Buffer
-	if err := t.Execute(util.NewTimeoutWriter(&buf, templateMaxExecutionTime), data); err != nil {
-		return "", errHTTPBadRequestTemplateExecuteFailed
+	limitWriter := util.NewLimitWriter(util.NewTimeoutWriter(&buf, templateMaxExecutionTime), util.NewFixedLimiter(templateMaxOutputBytes))
+	if err := t.Execute(limitWriter, data); err != nil {
+		return "", errHTTPBadRequestTemplateExecuteFailed.Wrap("%s", err.Error())
 	}
-	return buf.String(), nil
+	return strings.TrimSpace(strings.ReplaceAll(buf.String(), "\\n", "\n")), nil // replace any remaining "\n" (those outside of template curly braces) with newlines
 }

 func (s *Server) handleBodyAsAttachment(r *http.Request, v *visitor, m *message, body *util.PeekedReadCloser) error {
@@ -1937,7 +2010,7 @@ func (s *Server) authorizeTopic(next handleFunc, perm user.Permission) handleFun
 // that subsequent logging calls still have a visitor context.
 func (s *Server) maybeAuthenticate(r *http.Request) (*visitor, error) {
 	// Read the "Authorization" header value and exit out early if it's not set
-	ip := extractIPAddress(r, s.config.BehindProxy, s.config.ProxyForwardedHeader, s.config.ProxyTrustedAddresses)
+	ip := extractIPAddress(r, s.config.BehindProxy, s.config.ProxyForwardedHeader, s.config.ProxyTrustedPrefixes)
 	vip := s.visitor(ip, nil)
 	if s.userManager == nil {
 		return vip, nil
@@ -2012,7 +2085,7 @@ func (s *Server) authenticateBearerAuth(r *http.Request, token string) (*user.Us
 	if err != nil {
 		return nil, err
 	}
-	ip := extractIPAddress(r, s.config.BehindProxy, s.config.ProxyForwardedHeader, s.config.ProxyTrustedAddresses)
+	ip := extractIPAddress(r, s.config.BehindProxy, s.config.ProxyForwardedHeader, s.config.ProxyTrustedPrefixes)
 	go s.userManager.EnqueueTokenUpdate(token, &user.TokenUpdate{
 		LastAccess: time.Now(),
 		LastOrigin: ip,
@@ -2023,7 +2096,7 @@ func (s *Server) authenticateBearerAuth(r *http.Request, token string) (*user.Us
 func (s *Server) visitor(ip netip.Addr, user *user.User) *visitor {
 	s.mu.Lock()
 	defer s.mu.Unlock()
-	id := visitorID(ip, user)
+	id := visitorID(ip, user, s.config)
 	v, exists := s.visitors[id]
 	if !exists {
 		s.visitors[id] = newVisitor(s.config, s.messageCache, s.userManager, ip, user)
--- a/server/server.yml
+++ b/server/server.yml
@@ -82,6 +82,14 @@
 #   set to "read-write" (default), "read-only", "write-only" or "deny-all".
 # - auth-startup-queries allows you to run commands when the database is initialized, e.g. to enable
 #   WAL mode. This is similar to cache-startup-queries. See above for details.
+# - auth-users is a list of users that are automatically created when the server starts.
+#   Each entry is in the format "<username>:<password-hash>:<role>", e.g. "phil:$2a$10$YLiO8U21sX1uhZamTLJXHuxgVC0Z/GKISibrKCLohPgtG7yIxSk4C:user"
+#   Use 'ntfy user hash' to generate the password hash from a password.
+# - auth-access is a list of access control entries that are automatically created when the server starts.
+#   Each entry is in the format "<username>:<topic-pattern>:<access>", e.g. "phil:mytopic:rw" or "phil:phil-*:rw".
+# - auth-tokens is a list of access tokens that are automatically created when the server starts.
+#   Each entry is in the format "<username>:<token>[:<label>]", e.g. "phil:tk_1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef:My token".
+#   Use 'ntfy token generate' to generate a new access token.
 #
 # Debian/RPM package users:
 #   Use /var/lib/ntfy/user.db as user database to avoid permission issues. The package
@@ -94,6 +102,9 @@
 # auth-file: <filename>
 # auth-default-access: "read-write"
 # auth-startup-queries:
+# auth-users:
+# auth-access:
+# auth-tokens:

 # If set, the X-Forwarded-For header (or whatever is configured in proxy-forwarded-header) is used to determine
 # the visitor IP address instead of the remote address of the connection.
@@ -105,13 +116,13 @@
 #   proxy-forwarded-header. Without this, the remote address of the incoming connection is used.
 # - proxy-forwarded-header is the header to use to identify visitors. It may be a single IP address (e.g. 1.2.3.4),
 #   a comma-separated list of IP addresses (e.g. "1.2.3.4, 5.6.7.8"), or an RFC 7239-style header (e.g. "for=1.2.3.4;by=proxy.example.com, for=5.6.7.8").
-# - proxy-trusted-addresses is a comma-separated list of IP addresses that are removed from the forwarded header
+# - proxy-trusted-hosts is a comma-separated list of IP addresses, hostnames or CIDRs that are removed from the forwarded header
 #   to determine the real IP address. This is only useful if there are multiple proxies involved that add themselves to
 #   the forwarded header.
 #
 # behind-proxy: false
 # proxy-forwarded-header: "X-Forwarded-For"
-# proxy-trusted-addresses:
+# proxy-trusted-hosts:

 # If enabled, clients can attach files to notifications as attachments. Minimum settings to enable attachments
 # are "attachment-cache-dir" and "base-url".
@@ -126,6 +137,26 @@
 # attachment-file-size-limit: "15M"
 # attachment-expiry-duration: "3h"

+# Template directory for message templates.
+#
+# When "X-Template: <name>" (aliases: "Template: <name>", "Tpl: <name>") or "?template=<name>" is set, transform the message
+# based on one of the built-in pre-defined templates, or on a template defined in the "template-dir" directory.
+#
+# Template files must have the ".yml" extension and must be formatted as YAML. They may contain "title" and "message" keys,
+# which are interpreted as Go templates.
+#
+# Example template file (e.g. /etc/ntfy/templates/grafana.yml):
+#   title: |
+#     {{- if eq .status "firing" }}
+#     {{ .title | default "Alert firing" }}
+#     {{- else if eq .status "resolved" }}
+#     {{ .title | default "Alert resolved" }}
+#     {{- end }}
+#   message: |
+#     {{ .message | trunc 2000 }}
+#
+# template-dir: "/etc/ntfy/templates"
+
 # If enabled, allow outgoing e-mail notifications via the 'X-Email' header. If this header is set,
 # messages will additionally be sent out as e-mail using an external SMTP server.
 #
@@ -292,6 +323,18 @@
 # visitor-email-limit-burst: 16
 # visitor-email-limit-replenish: "1h"

+# Rate limiting: IPv4/IPv6 address prefix bits used for rate limiting
+# - visitor-prefix-bits-ipv4: number of bits of the IPv4 address to use for rate limiting (default: 32, full address)
+# - visitor-prefix-bits-ipv6: number of bits of the IPv6 address to use for rate limiting (default: 64, /64 subnet)
+#
+# This is used to group visitors by their IP address or subnet. For example, if you set visitor-prefix-bits-ipv4 to 24,
+# all visitors in the 1.2.3.0/24 network are treated as one.
+#
+# By default, ntfy uses the full IPv4 address (32 bits) and the /64 subnet of the IPv6 address (64 bits).
+#
+# visitor-prefix-bits-ipv4: 32
+# visitor-prefix-bits-ipv6: 64
+
 # Rate limiting: Attachment size and bandwidth limits per visitor:
 # - visitor-attachment-total-size-limit is the total storage limit used for attachments per visitor
 # - visitor-attachment-daily-bandwidth-limit is the total daily attachment download/upload traffic limit per visitor
--- a/server/server_account.go
+++ b/server/server_account.go
@@ -85,6 +85,7 @@ func (s *Server) handleAccountGet(w http.ResponseWriter, r *http.Request, v *vis
 		response.Username = u.Name
 		response.Role = string(u.Role)
 		response.SyncTopic = u.SyncTopic
+		response.Provisioned = u.Provisioned
 		if u.Prefs != nil {
 			if u.Prefs.Language != nil {
 				response.Language = *u.Prefs.Language
@@ -139,11 +140,12 @@ func (s *Server) handleAccountGet(w http.ResponseWriter, r *http.Request, v *vis
 					lastOrigin = t.LastOrigin.String()
 				}
 				response.Tokens = append(response.Tokens, &apiAccountTokenResponse{
-					Token:      t.Value,
-					Label:      t.Label,
-					LastAccess: t.LastAccess.Unix(),
-					LastOrigin: lastOrigin,
-					Expires:    t.Expires.Unix(),
+					Token:       t.Value,
+					Label:       t.Label,
+					LastAccess:  t.LastAccess.Unix(),
+					LastOrigin:  lastOrigin,
+					Expires:     t.Expires.Unix(),
+					Provisioned: t.Provisioned,
 				})
 			}
 		}
@@ -174,6 +176,12 @@ func (s *Server) handleAccountDelete(w http.ResponseWriter, r *http.Request, v *
 	if _, err := s.userManager.Authenticate(u.Name, req.Password); err != nil {
 		return errHTTPBadRequestIncorrectPasswordConfirmation
 	}
+	if err := s.userManager.CanChangeUser(u.Name); err != nil {
+		if errors.Is(err, user.ErrProvisionedUserChange) {
+			return errHTTPConflictProvisionedUserChange
+		}
+		return err
+	}
 	if s.webPush != nil && u.ID != "" {
 		if err := s.webPush.RemoveSubscriptionsByUserID(u.ID); err != nil {
 			logvr(v, r).Err(err).Warn("Error removing web push subscriptions for %s", u.Name)
@@ -208,6 +216,9 @@ func (s *Server) handleAccountPasswordChange(w http.ResponseWriter, r *http.Requ
 	}
 	logvr(v, r).Tag(tagAccount).Debug("Changing password for user %s", u.Name)
 	if err := s.userManager.ChangePassword(u.Name, req.NewPassword, false); err != nil {
+		if errors.Is(err, user.ErrProvisionedUserChange) {
+			return errHTTPConflictProvisionedUserChange
+		}
 		return err
 	}
 	return s.writeJSON(w, newSuccessResponse())
@@ -234,7 +245,7 @@ func (s *Server) handleAccountTokenCreate(w http.ResponseWriter, r *http.Request
 			"token_expires": expires,
 		}).
 		Debug("Creating token for user %s", u.Name)
-	token, err := s.userManager.CreateToken(u.ID, label, expires, v.IP())
+	token, err := s.userManager.CreateToken(u.ID, label, expires, v.IP(), false)
 	if err != nil {
 		return err
 	}
@@ -274,6 +285,9 @@ func (s *Server) handleAccountTokenUpdate(w http.ResponseWriter, r *http.Request
 		Debug("Updating token for user %s as deleted", u.Name)
 	token, err := s.userManager.ChangeToken(u.ID, req.Token, req.Label, expires)
 	if err != nil {
+		if errors.Is(err, user.ErrProvisionedTokenChange) {
+			return errHTTPConflictProvisionedTokenChange
+		}
 		return err
 	}
 	response := &apiAccountTokenResponse{
@@ -296,6 +310,9 @@ func (s *Server) handleAccountTokenDelete(w http.ResponseWriter, r *http.Request
 		}
 	}
 	if err := s.userManager.RemoveToken(u.ID, token); err != nil {
+		if errors.Is(err, user.ErrProvisionedTokenChange) {
+			return errHTTPConflictProvisionedTokenChange
+		}
 		return err
 	}
 	logvr(v, r).
--- a/server/server_account_test.go
+++ b/server/server_account_test.go
@@ -176,7 +176,7 @@ func TestAccount_ChangeSettings(t *testing.T) {

 	require.Nil(t, s.userManager.AddUser("phil", "phil", user.RoleUser, false))
 	u, _ := s.userManager.User("phil")
-	token, _ := s.userManager.CreateToken(u.ID, "", time.Unix(0, 0), netip.IPv4Unspecified())
+	token, _ := s.userManager.CreateToken(u.ID, "", time.Unix(0, 0), netip.IPv4Unspecified(), false)

 	rr := request(t, s, "PATCH", "/v1/account/settings", `{"notification": {"sound": "juntos"},"ignored": true}`, map[string]string{
 		"Authorization": util.BasicAuth("phil", "phil"),
@@ -251,7 +251,11 @@ func TestAccount_Subscription_AddUpdateDelete(t *testing.T) {
 }

 func TestAccount_ChangePassword(t *testing.T) {
-	s := newTestServer(t, newTestConfigWithAuthFile(t))
+	conf := newTestConfigWithAuthFile(t)
+	conf.AuthUsers = []*user.User{
+		{Name: "philuser", Hash: "$2a$10$U4WSIYY6evyGmZaraavM2e2JeVG6EMGUKN1uUwufUeeRd4Jpg6cGC", Role: user.RoleUser}, // philuser:philpass
+	}
+	s := newTestServer(t, conf)
 	defer s.closeDatabases()

 	require.Nil(t, s.userManager.AddUser("phil", "phil", user.RoleUser, false))
@@ -281,6 +285,12 @@ func TestAccount_ChangePassword(t *testing.T) {
 		"Authorization": util.BasicAuth("phil", "new password"),
 	})
 	require.Equal(t, 200, rr.Code)
+
+	// Cannot change password of provisioned user
+	rr = request(t, s, "POST", "/v1/account/password", `{"password": "philpass", "new_password": "new password"}`, map[string]string{
+		"Authorization": util.BasicAuth("philuser", "philpass"),
+	})
+	require.Equal(t, 409, rr.Code)
 }

 func TestAccount_ChangePassword_NoAccount(t *testing.T) {
--- a/server/server_admin.go
+++ b/server/server_admin.go
@@ -25,7 +25,7 @@ func (s *Server) handleUsersGet(w http.ResponseWriter, r *http.Request, v *visit
 		for i, g := range grants[u.ID] {
 			userGrants[i] = &apiUserGrantResponse{
 				Topic:      g.TopicPattern,
-				Permission: g.Allow.String(),
+				Permission: g.Permission.String(),
 			}
 		}
 		usersResponse[i] = &apiUserResponse{
--- a/server/server_middleware.go
+++ b/server/server_middleware.go
@@ -16,7 +16,7 @@ const (

 func (s *Server) limitRequests(next handleFunc) handleFunc {
 	return func(w http.ResponseWriter, r *http.Request, v *visitor) error {
-		if util.ContainsIP(s.config.VisitorRequestExemptIPAddrs, v.ip) {
+		if util.ContainsIP(s.config.VisitorRequestExemptPrefixes, v.ip) {
 			return next(w, r, v)
 		} else if !v.RequestAllowed() {
 			return errHTTPTooManyRequestsLimitRequests
@@ -40,7 +40,7 @@ func (s *Server) limitRequestsWithTopic(next handleFunc) handleFunc {
 			contextRateVisitor: vrate,
 			contextTopic:       t,
 		})
-		if util.ContainsIP(s.config.VisitorRequestExemptIPAddrs, v.ip) {
+		if util.ContainsIP(s.config.VisitorRequestExemptPrefixes, v.ip) {
 			return next(w, r, v)
 		} else if !vrate.RequestAllowed() {
 			return errHTTPTooManyRequestsLimitRequests
--- a/server/server_test.go
+++ b/server/server_test.go
@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"context"
 	"crypto/rand"
+	_ "embed"
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
@@ -1169,7 +1170,7 @@ func (t *testMailer) Count() int {
 	return t.count
 }

-func TestServer_PublishTooRequests_Defaults(t *testing.T) {
+func TestServer_PublishTooManyRequests_Defaults(t *testing.T) {
 	s := newTestServer(t, newTestConfig(t))
 	for i := 0; i < 60; i++ {
 		response := request(t, s, "PUT", "/mytopic", fmt.Sprintf("message %d", i), nil)
@@ -1179,10 +1180,53 @@ func TestServer_PublishTooRequests_Defaults(t *testing.T) {
 	require.Equal(t, 429, response.Code)
 }

-func TestServer_PublishTooRequests_Defaults_ExemptHosts(t *testing.T) {
+func TestServer_PublishTooManyRequests_Defaults_IPv6(t *testing.T) {
+	s := newTestServer(t, newTestConfig(t))
+	overrideRemoteAddr1 := func(r *http.Request) {
+		r.RemoteAddr = "[2001:db8:9999:8888:1::1]:1234"
+	}
+	overrideRemoteAddr2 := func(r *http.Request) {
+		r.RemoteAddr = "[2001:db8:9999:8888:2::1]:1234" // Same /64
+	}
+	for i := 0; i < 30; i++ {
+		response := request(t, s, "PUT", "/mytopic", fmt.Sprintf("message %d", i), nil, overrideRemoteAddr1)
+		require.Equal(t, 200, response.Code)
+	}
+	for i := 0; i < 30; i++ {
+		response := request(t, s, "PUT", "/mytopic", fmt.Sprintf("message %d", i), nil, overrideRemoteAddr2)
+		require.Equal(t, 200, response.Code)
+	}
+	response := request(t, s, "PUT", "/mytopic", "message", nil, overrideRemoteAddr1)
+	require.Equal(t, 429, response.Code)
+}
+
+func TestServer_PublishTooManyRequests_IPv6_Slash48(t *testing.T) {
+	c := newTestConfig(t)
+	c.VisitorRequestLimitBurst = 6
+	c.VisitorPrefixBitsIPv6 = 48 // Use /48 for IPv6 prefixes
+	s := newTestServer(t, c)
+	overrideRemoteAddr1 := func(r *http.Request) {
+		r.RemoteAddr = "[2001:db8:9999::1]:1234"
+	}
+	overrideRemoteAddr2 := func(r *http.Request) {
+		r.RemoteAddr = "[2001:db8:9999::2]:1234" // Same /48
+	}
+	for i := 0; i < 3; i++ {
+		response := request(t, s, "PUT", "/mytopic", fmt.Sprintf("message %d", i), nil, overrideRemoteAddr1)
+		require.Equal(t, 200, response.Code)
+	}
+	for i := 0; i < 3; i++ {
+		response := request(t, s, "PUT", "/mytopic", fmt.Sprintf("message %d", i), nil, overrideRemoteAddr2)
+		require.Equal(t, 200, response.Code)
+	}
+	response := request(t, s, "PUT", "/mytopic", "message", nil, overrideRemoteAddr1)
+	require.Equal(t, 429, response.Code)
+}
+
+func TestServer_PublishTooManyRequests_Defaults_ExemptHosts(t *testing.T) {
 	c := newTestConfig(t)
 	c.VisitorRequestLimitBurst = 3
-	c.VisitorRequestExemptIPAddrs = []netip.Prefix{netip.MustParsePrefix("9.9.9.9/32")} // see request()
+	c.VisitorRequestExemptPrefixes = []netip.Prefix{netip.MustParsePrefix("9.9.9.9/32")} // see request()
 	s := newTestServer(t, c)
 	for i := 0; i < 5; i++ { // > 3
 		response := request(t, s, "PUT", "/mytopic", fmt.Sprintf("message %d", i), nil)
@@ -1190,11 +1234,25 @@ func TestServer_PublishTooRequests_Defaults_ExemptHosts(t *testing.T) {
 	}
 }

-func TestServer_PublishTooRequests_Defaults_ExemptHosts_MessageDailyLimit(t *testing.T) {
+func TestServer_PublishTooManyRequests_Defaults_ExemptHosts_IPv6(t *testing.T) {
+	c := newTestConfig(t)
+	c.VisitorRequestLimitBurst = 3
+	c.VisitorRequestExemptPrefixes = []netip.Prefix{netip.MustParsePrefix("2001:db8:9999::/48")}
+	s := newTestServer(t, c)
+	overrideRemoteAddr := func(r *http.Request) {
+		r.RemoteAddr = "[2001:db8:9999::1]:1234"
+	}
+	for i := 0; i < 5; i++ { // > 3
+		response := request(t, s, "PUT", "/mytopic", fmt.Sprintf("message %d", i), nil, overrideRemoteAddr)
+		require.Equal(t, 200, response.Code)
+	}
+}
+
+func TestServer_PublishTooManyRequests_Defaults_ExemptHosts_MessageDailyLimit(t *testing.T) {
 	c := newTestConfig(t)
 	c.VisitorRequestLimitBurst = 10
 	c.VisitorMessageDailyLimit = 4
-	c.VisitorRequestExemptIPAddrs = []netip.Prefix{netip.MustParsePrefix("9.9.9.9/32")} // see request()
+	c.VisitorRequestExemptPrefixes = []netip.Prefix{netip.MustParsePrefix("9.9.9.9/32")} // see request()
 	s := newTestServer(t, c)
 	for i := 0; i < 8; i++ { // 4
 		response := request(t, s, "PUT", "/mytopic", "message", nil)
@@ -1202,7 +1260,7 @@ func TestServer_PublishTooRequests_Defaults_ExemptHosts_MessageDailyLimit(t *tes
 	}
 }

-func TestServer_PublishTooRequests_ShortReplenish(t *testing.T) {
+func TestServer_PublishTooManyRequests_ShortReplenish(t *testing.T) {
 	t.Parallel()
 	c := newTestConfig(t)
 	c.VisitorRequestLimitBurst = 60
@@ -2244,11 +2302,24 @@ func TestServer_Visitor_Custom_ClientIP_Header(t *testing.T) {
 	require.Equal(t, "1.2.3.4", v.ip.String())
 }

+func TestServer_Visitor_Custom_ClientIP_Header_IPv6(t *testing.T) {
+	c := newTestConfig(t)
+	c.BehindProxy = true
+	c.ProxyForwardedHeader = "X-Client-IP"
+	s := newTestServer(t, c)
+	r, _ := http.NewRequest("GET", "/bla", nil)
+	r.RemoteAddr = "[2001:db8:9999::1]:1234"
+	r.Header.Set("X-Client-IP", "2001:db8:7777::1")
+	v, err := s.maybeAuthenticate(r)
+	require.Nil(t, err)
+	require.Equal(t, "2001:db8:7777::1", v.ip.String())
+}
+
 func TestServer_Visitor_Custom_Forwarded_Header(t *testing.T) {
 	c := newTestConfig(t)
 	c.BehindProxy = true
 	c.ProxyForwardedHeader = "Forwarded"
-	c.ProxyTrustedAddresses = []string{"1.2.3.4"}
+	c.ProxyTrustedPrefixes = []netip.Prefix{netip.MustParsePrefix("1.2.3.0/24")}
 	s := newTestServer(t, c)
 	r, _ := http.NewRequest("GET", "/bla", nil)
 	r.RemoteAddr = "8.9.10.11:1234"
@@ -2258,6 +2329,20 @@ func TestServer_Visitor_Custom_Forwarded_Header(t *testing.T) {
 	require.Equal(t, "5.6.7.8", v.ip.String())
 }

+func TestServer_Visitor_Custom_Forwarded_Header_IPv6(t *testing.T) {
+	c := newTestConfig(t)
+	c.BehindProxy = true
+	c.ProxyForwardedHeader = "Forwarded"
+	c.ProxyTrustedPrefixes = []netip.Prefix{netip.MustParsePrefix("2001:db8:1111::/64")}
+	s := newTestServer(t, c)
+	r, _ := http.NewRequest("GET", "/bla", nil)
+	r.RemoteAddr = "[2001:db8:2222::1]:1234"
+	r.Header.Set("Forwarded", " for=[2001:db8:1111::1], by=example.com;for=[2001:db8:3333::1]")
+	v, err := s.maybeAuthenticate(r)
+	require.Nil(t, err)
+	require.Equal(t, "2001:db8:3333::1", v.ip.String())
+}
+
 func TestServer_PublishWhileUpdatingStatsWithLotsOfMessages(t *testing.T) {
 	t.Parallel()
 	count := 50000
@@ -2833,7 +2918,7 @@ func TestServer_MessageTemplate_Range(t *testing.T) {

 	require.Equal(t, 200, response.Code)
 	m := toMessage(t, response.Body.String())
-	require.Equal(t, "Severe URLs:\n- https://severe1.com\n- https://severe2.com\n", m.Message)
+	require.Equal(t, "Severe URLs:\n- https://severe1.com\n- https://severe2.com", m.Message)
 }

 func TestServer_MessageTemplate_ExceedMessageSize_TemplatedMessageOK(t *testing.T) {
@@ -2886,8 +2971,7 @@ Labels:
 Annotations:
 - summary = 15m load average too high
 Source: localhost:3000/alerting/grafana/NW9oDw-4z/view
-Silence: localhost:3000/alerting/silence/new?alertmanager=grafana&matcher=alertname%3DLoad+avg+15m+too+high&matcher=grafana_folder%3DNode+alerts&matcher=instance%3D10.108.0.2%3A9100&matcher=job%3Dnode-exporter
-`, m.Message)
+Silence: localhost:3000/alerting/silence/new?alertmanager=grafana&matcher=alertname%3DLoad+avg+15m+too+high&matcher=grafana_folder%3DNode+alerts&matcher=instance%3D10.108.0.2%3A9100&matcher=job%3Dnode-exporter`, m.Message)
 }

 func TestServer_MessageTemplate_GitHub(t *testing.T) {
@@ -2940,12 +3024,223 @@ template ""}}`,
 	}
 }

+func TestServer_MessageTemplate_SprigFunctions(t *testing.T) {
+	t.Parallel()
+	s := newTestServer(t, newTestConfig(t))
+	bodies := []string{
+		`{"foo":"bar","nested":{"title":"here"}}`,
+		`{"topic":"ntfy-test"}`,
+		`{"topic":"another-topic"}`,
+	}
+	templates := []string{
+		`{{.foo | upper}} is {{.nested.title | repeat 3}}`,
+		`{{if hasPrefix "ntfy-" .topic}}Topic: {{trimPrefix "ntfy-" .topic}}{{ else }}Topic: {{.topic}}{{end}}`,
+		`{{if hasPrefix "ntfy-" .topic}}Topic: {{trimPrefix "ntfy-" .topic}}{{ else }}Topic: {{.topic}}{{end}}`,
+	}
+	targets := []string{
+		`BAR is hereherehere`,
+		`Topic: test`,
+		`Topic: another-topic`,
+	}
+	for i, body := range bodies {
+		template := templates[i]
+		target := targets[i]
+		t.Run(template, func(t *testing.T) {
+			response := request(t, s, "PUT", `/mytopic`, body, map[string]string{
+				"Template": "yes",
+				"Message":  template,
+			})
+			require.Equal(t, 200, response.Code)
+			m := toMessage(t, response.Body.String())
+			require.Equal(t, target, m.Message)
+		})
+	}
+}
+
+func TestServer_MessageTemplate_UnsafeSprigFunctions(t *testing.T) {
+	t.Parallel()
+	s := newTestServer(t, newTestConfig(t))
+	response := request(t, s, "POST", "/mytopic", `{}`, map[string]string{
+		"X-Message":  `{{ env "PATH" }}`,
+		"X-Template": "1",
+	})
+
+	require.Equal(t, 400, response.Code)
+	require.Equal(t, 40043, toHTTPError(t, response.Body.String()).Code)
+}
+
+func TestServer_MessageTemplate_InlineNewlines(t *testing.T) {
+	t.Parallel()
+	s := newTestServer(t, newTestConfig(t))
+	response := request(t, s, "PUT", "/mytopic", `{}`, map[string]string{
+		"X-Message":  `{{"New\nlines"}}`,
+		"X-Title":    `{{"New\nlines"}}`,
+		"X-Template": "1",
+	})
+
+	require.Equal(t, 200, response.Code)
+	m := toMessage(t, response.Body.String())
+	require.Equal(t, `New
+lines`, m.Message)
+	require.Equal(t, `New
+lines`, m.Title)
+}
+
+func TestServer_MessageTemplate_InlineNewlinesOutsideOfTemplate(t *testing.T) {
+	t.Parallel()
+	s := newTestServer(t, newTestConfig(t))
+	response := request(t, s, "PUT", "/mytopic", `{"foo":"bar","food":"bag"}`, map[string]string{
+		"X-Message":  `{{.foo}}{{"\n"}}{{.food}}`,
+		"X-Title":    `{{.food}}{{"\n"}}{{.foo}}`,
+		"X-Template": "1",
+	})
+
+	require.Equal(t, 200, response.Code)
+	m := toMessage(t, response.Body.String())
+	require.Equal(t, `bar
+bag`, m.Message)
+	require.Equal(t, `bag
+bar`, m.Title)
+}
+
+func TestServer_MessageTemplate_TemplateFileNewlines(t *testing.T) {
+	t.Parallel()
+	c := newTestConfig(t)
+	c.TemplateDir = t.TempDir()
+	require.NoError(t, os.WriteFile(filepath.Join(c.TemplateDir, "newline.yml"), []byte(`
+title: |
+  {{.food}}{{"\n"}}{{.foo}}
+message: |
+  {{.foo}}{{"\n"}}{{.food}}
+`), 0644))
+	s := newTestServer(t, c)
+	response := request(t, s, "POST", "/mytopic?template=newline", `{"foo":"bar","food":"bag"}`, nil)
+	fmt.Println(response.Body.String())
+	require.Equal(t, 200, response.Code)
+	m := toMessage(t, response.Body.String())
+	require.Equal(t, `bar
+bag`, m.Message)
+	require.Equal(t, `bag
+bar`, m.Title)
+}
+
+var (
+	//go:embed testdata/webhook_github_comment_created.json
+	githubCommentCreatedJSON string
+
+	//go:embed testdata/webhook_github_issue_opened.json
+	githubIssueOpenedJSON string
+)
+
+func TestServer_MessageTemplate_FromNamedTemplate_GitHubCommentCreated(t *testing.T) {
+	t.Parallel()
+	s := newTestServer(t, newTestConfig(t))
+	response := request(t, s, "POST", "/mytopic?template=github", githubCommentCreatedJSON, nil)
+	require.Equal(t, 200, response.Code)
+	m := toMessage(t, response.Body.String())
+	require.Equal(t, "💬 New comment on issue #1389 instant alerts without Pull to refresh", m.Title)
+	require.Equal(t, `Commenter: https://github.com/wunter8
+Repository: https://github.com/binwiederhier/ntfy
+Comment link: https://github.com/binwiederhier/ntfy/issues/1389#issuecomment-3078214289
+
+Comment:
+These are the things you need to do to get iOS push notifications to work:
+1. open a browser to the web app of your ntfy instance and copy the URL (including "http://" or "https://", your domain or IP address, and any ports, and excluding any trailing slashes)
+2. put the URL you copied in the ntfy `+"`"+`base-url`+"`"+` config in server.yml or NTFY_BASE_URL in env variables
+3. put the URL you copied in the default server URL setting in the iOS ntfy app
+4. set `+"`"+`upstream-base-url`+"`"+` in server.yml or NTFY_UPSTREAM_BASE_URL in env variables to "https://ntfy.sh" (without a trailing slash)`, m.Message)
+}
+
+func TestServer_MessageTemplate_FromNamedTemplate_GitHubIssueOpened(t *testing.T) {
+	t.Parallel()
+	s := newTestServer(t, newTestConfig(t))
+	response := request(t, s, "POST", "/mytopic?template=github", githubIssueOpenedJSON, nil)
+	require.Equal(t, 200, response.Code)
+	m := toMessage(t, response.Body.String())
+	require.Equal(t, "🐛 Issue opened: #1391 http 500 error (ntfy error 50001)", m.Title)
+	require.Equal(t, `Opened by: https://github.com/TheUser-dev
+Repository: https://github.com/binwiederhier/ntfy
+Issue link: https://github.com/binwiederhier/ntfy/issues/1391
+Labels: 🪲 bug 
+
+Description:
+:lady_beetle: **Describe the bug**
+When sending a notification (especially when it happens with multiple requests) this error occurs
+
+:computer: **Components impacted**
+ntfy server 2.13.0 in docker, debian 12 arm64
+
+:bulb: **Screenshots and/or logs**
+`+"```"+`
+closed with HTTP 500 (ntfy error 50001) (error=database table is locked, http_method=POST, http_path=/_matrix/push/v1/notify, tag=http, visitor_auth_limiter_limit=0.016666666666666666, visitor_auth_limiter_tokens=30, visitor_id=ip:<edited>, visitor_ip=<edited>, visitor_messages=448, visitor_messages_limit=17280, visitor_messages_remaining=16832, visitor_request_limiter_limit=0.2, visitor_request_limiter_tokens=57.049697891799994, visitor_seen=2025-07-16T15:06:35.429Z)
+`+"```"+`
+
+:crystal_ball: **Additional context**
+Looks like this has already been fixed by #498, regression?`, m.Message)
+}
+
+func TestServer_MessageTemplate_FromNamedTemplate_GitHubIssueOpened_OverrideConfigTemplate(t *testing.T) {
+	t.Parallel()
+	c := newTestConfig(t)
+	c.TemplateDir = t.TempDir()
+	require.NoError(t, os.WriteFile(filepath.Join(c.TemplateDir, "github.yml"), []byte(`
+title: |
+  Custom title: action={{ .action }} trunctitle={{ .issue.title | trunc 10 }}
+message: |
+  Custom message {{ .issue.number }}
+`), 0644))
+	s := newTestServer(t, c)
+	response := request(t, s, "POST", "/mytopic?template=github", githubIssueOpenedJSON, nil)
+	fmt.Println(response.Body.String())
+	require.Equal(t, 200, response.Code)
+	m := toMessage(t, response.Body.String())
+	require.Equal(t, "Custom title: action=opened trunctitle=http 500 e", m.Title)
+	require.Equal(t, "Custom message 1391", m.Message)
+}
+
+func TestServer_MessageTemplate_Repeat9999_TooLarge(t *testing.T) {
+	t.Parallel()
+	s := newTestServer(t, newTestConfig(t))
+	response := request(t, s, "POST", "/mytopic", `{}`, map[string]string{
+		"X-Message":  `{{ repeat 9999 "mystring" }}`,
+		"X-Template": "1",
+	})
+	require.Equal(t, 400, response.Code)
+	require.Equal(t, 40041, toHTTPError(t, response.Body.String()).Code)
+	require.Contains(t, toHTTPError(t, response.Body.String()).Message, "message or title is too large after replacing template")
+}
+
+func TestServer_MessageTemplate_Repeat10001_TooLarge(t *testing.T) {
+	t.Parallel()
+	s := newTestServer(t, newTestConfig(t))
+	response := request(t, s, "POST", "/mytopic", `{}`, map[string]string{
+		"X-Message":  `{{ repeat 10001 "mystring" }}`,
+		"X-Template": "1",
+	})
+	require.Equal(t, 400, response.Code)
+	require.Equal(t, 40045, toHTTPError(t, response.Body.String()).Code)
+	require.Contains(t, toHTTPError(t, response.Body.String()).Message, "repeat count 10001 exceeds limit of 10000")
+}
+
+func TestServer_MessageTemplate_Until100_000(t *testing.T) {
+	t.Parallel()
+	s := newTestServer(t, newTestConfig(t))
+	response := request(t, s, "POST", "/mytopic", `{}`, map[string]string{
+		"X-Message":  `{{ range $i, $e := until 100_000 }}{{end}}`,
+		"X-Template": "1",
+	})
+	require.Equal(t, 400, response.Code)
+	require.Equal(t, 40045, toHTTPError(t, response.Body.String()).Code)
+	require.Contains(t, toHTTPError(t, response.Body.String()).Message, "too many iterations")
+}
+
 func newTestConfig(t *testing.T) *Config {
 	conf := NewConfig()
 	conf.BaseURL = "http://127.0.0.1:12345"
 	conf.CacheFile = filepath.Join(t.TempDir(), "cache.db")
 	conf.CacheStartupQueries = "pragma journal_mode = WAL; pragma synchronous = normal; pragma temp_store = memory;"
 	conf.AttachmentCacheDir = t.TempDir()
+	conf.TemplateDir = t.TempDir()
 	return conf
 }

--- a/server/smtp_server.go
+++ b/server/smtp_server.go
@@ -5,8 +5,6 @@ import (
 	"encoding/base64"
 	"errors"
 	"fmt"
-	"github.com/emersion/go-smtp"
-	"github.com/microcosm-cc/bluemonday"
 	"io"
 	"mime"
 	"mime/multipart"
@@ -18,6 +16,9 @@ import (
 	"regexp"
 	"strings"
 	"sync"
+
+	"github.com/emersion/go-smtp"
+	"github.com/microcosm-cc/bluemonday"
 )

 var (
@@ -191,12 +192,12 @@ func (s *smtpSession) publishMessage(m *message) error {
 	// Call HTTP handler with fake HTTP request
 	url := fmt.Sprintf("%s/%s", s.backend.config.BaseURL, m.Topic)
 	req, err := http.NewRequest("POST", url, strings.NewReader(m.Message))
-	req.RequestURI = "/" + m.Topic // just for the logs
-	req.RemoteAddr = remoteAddr    // rate limiting!!
-	req.Header.Set("X-Forwarded-For", remoteAddr)
 	if err != nil {
 		return err
 	}
+	req.RequestURI = "/" + m.Topic                                    // just for the logs
+	req.RemoteAddr = remoteAddr                                       // rate limiting!!
+	req.Header.Set(s.backend.config.ProxyForwardedHeader, remoteAddr) // Set X-Forwarded-For header
 	if m.Title != "" {
 		req.Header.Set("Title", m.Title)
 	}
--- a/server/templates/alertmanager.yml
+++ b/server/templates/alertmanager.yml
@@ -0,0 +1,27 @@
+title: |
+  {{- if eq .status "firing" }}
+  🚨 Alert: {{ (first .alerts).labels.alertname }}
+  {{- else if eq .status "resolved" }}
+  ✅ Resolved: {{ (first .alerts).labels.alertname }}
+  {{- else }}
+  {{ fail "Unsupported Alertmanager status." }}
+  {{- end }}
+message: |
+  Status: {{ .status | title }}
+  Receiver: {{ .receiver }}
+  
+  {{- range .alerts }}
+  Alert: {{ .labels.alertname }}
+  Instance: {{ .labels.instance }}
+  Severity: {{ .labels.severity }}
+  Starts at: {{ .startsAt }}
+  {{- if .endsAt }}Ends at: {{ .endsAt }}{{ end }}
+  {{- if .annotations.summary }}
+  Summary: {{ .annotations.summary }}
+  {{- end }}
+  {{- if .annotations.description }}
+  Description: {{ .annotations.description }}
+  {{- end }}
+  Source: {{ .generatorURL }}
+  
+  {{ end }}
--- a/server/templates/github.yml
+++ b/server/templates/github.yml
@@ -0,0 +1,57 @@
+title: |
+  {{- if and .starred_at (eq .action "created")}}
+  ⭐ {{ .sender.login }} starred {{ .repository.name }}
+  
+  {{- else if and .repository (eq .action "started")}}
+  👀 {{ .sender.login }} started watching {{ .repository.name }}
+  
+  {{- else if and .comment (eq .action "created") }}
+  💬 New comment on issue #{{ .issue.number }} {{ .issue.title }}
+  
+  {{- else if .pull_request }}
+  🔀 Pull request {{ .action }}: #{{ .pull_request.number }} {{ .pull_request.title }}
+  
+  {{- else if .issue }}
+  🐛 Issue {{ .action }}: #{{ .issue.number }} {{ .issue.title }}
+  
+  {{- else }}
+  {{ fail "Unsupported GitHub event type or action." }}
+  {{- end }}
+message: |
+  {{ if and .starred_at (eq .action "created")}}
+  Stargazer: {{ .sender.html_url }}
+  Repository: {{ .repository.html_url }}
+  
+  {{- else if and .repository (eq .action "started")}}
+  Watcher: {{ .sender.html_url }}
+  Repository: {{ .repository.html_url }}
+  
+  {{- else if and .comment (eq .action "created") }}
+  Commenter: {{ .comment.user.html_url }}
+  Repository: {{ .repository.html_url }}
+  Comment link: {{ .comment.html_url }}
+  {{ if .comment.body }}
+  Comment:
+  {{ .comment.body | trunc 2000 }}{{ end }}
+  
+  {{- else if .pull_request }}
+  Branch: {{ .pull_request.head.ref }} → {{ .pull_request.base.ref }}
+  {{ .action | title }} by: {{ .pull_request.user.html_url }}
+  Repository: {{ .repository.html_url }}
+  Pull request: {{ .pull_request.html_url }}
+  {{ if .pull_request.body }}
+  Description:
+  {{ .pull_request.body | trunc 2000 }}{{ end }}
+  
+  {{- else if .issue }}
+  {{ .action | title }} by: {{ .issue.user.html_url }}
+  Repository: {{ .repository.html_url }}
+  Issue link: {{ .issue.html_url }}
+  {{ if .issue.labels }}Labels: {{ range .issue.labels }}{{ .name }} {{ end }}{{ end }}
+  {{ if .issue.body }}
+  Description:
+  {{ .issue.body | trunc 2000 }}{{ end }}
+  
+  {{- else }}
+  {{ fail "Unsupported GitHub event type or action." }}
+  {{- end }}
--- a/server/templates/grafana.yml
+++ b/server/templates/grafana.yml
@@ -0,0 +1,10 @@
+title: |
+  {{- if eq .status "firing" }}
+  🚨 {{ .title | default "Alert firing" }}
+  {{- else if eq .status "resolved" }}
+  ✅ {{ .title | default "Alert resolved" }}
+  {{- else }}
+  ⚠️ Unknown alert: {{ .title | default "Alert" }}
+  {{- end }}
+message: |
+  {{ .message | trunc 2000 }}
--- a/server/testdata/webhook_alertmanager_firing.json
+++ b/server/testdata/webhook_alertmanager_firing.json
@@ -0,0 +1,33 @@
+{
+  "version": "4",
+  "groupKey": "...",
+  "status": "firing",
+  "receiver": "webhook-receiver",
+  "groupLabels": {
+    "alertname": "HighCPUUsage"
+  },
+  "commonLabels": {
+    "alertname": "HighCPUUsage",
+    "instance": "server01",
+    "severity": "critical"
+  },
+  "commonAnnotations": {
+    "summary": "High CPU usage detected"
+  },
+  "alerts": [
+    {
+      "status": "firing",
+      "labels": {
+        "alertname": "HighCPUUsage",
+        "instance": "server01",
+        "severity": "critical"
+      },
+      "annotations": {
+        "summary": "High CPU usage detected"
+      },
+      "startsAt": "2025-07-17T07:00:00Z",
+      "endsAt": "0001-01-01T00:00:00Z",
+      "generatorURL": "http://prometheus.local/graph?g0.expr=..."
+    }
+  ]
+}
--- a/server/testdata/webhook_github_comment_created.json
+++ b/server/testdata/webhook_github_comment_created.json
@@ -0,0 +1,261 @@
+{
+  "action": "created",
+  "issue": {
+    "url": "https://api.github.com/repos/binwiederhier/ntfy/issues/1389",
+    "repository_url": "https://api.github.com/repos/binwiederhier/ntfy",
+    "labels_url": "https://api.github.com/repos/binwiederhier/ntfy/issues/1389/labels{/name}",
+    "comments_url": "https://api.github.com/repos/binwiederhier/ntfy/issues/1389/comments",
+    "events_url": "https://api.github.com/repos/binwiederhier/ntfy/issues/1389/events",
+    "html_url": "https://github.com/binwiederhier/ntfy/issues/1389",
+    "id": 3230655753,
+    "node_id": "I_kwDOGRBhi87Aj-UJ",
+    "number": 1389,
+    "title": "instant alerts without Pull to refresh",
+    "user": {
+      "login": "edbraunh",
+      "id": 8795846,
+      "node_id": "MDQ6VXNlcjg3OTU4NDY=",
+      "avatar_url": "https://avatars.githubusercontent.com/u/8795846?v=4",
+      "gravatar_id": "",
+      "url": "https://api.github.com/users/edbraunh",
+      "html_url": "https://github.com/edbraunh",
+      "followers_url": "https://api.github.com/users/edbraunh/followers",
+      "following_url": "https://api.github.com/users/edbraunh/following{/other_user}",
+      "gists_url": "https://api.github.com/users/edbraunh/gists{/gist_id}",
+      "starred_url": "https://api.github.com/users/edbraunh/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/edbraunh/subscriptions",
+      "organizations_url": "https://api.github.com/users/edbraunh/orgs",
+      "repos_url": "https://api.github.com/users/edbraunh/repos",
+      "events_url": "https://api.github.com/users/edbraunh/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/edbraunh/received_events",
+      "type": "User",
+      "user_view_type": "public",
+      "site_admin": false
+    },
+    "labels": [
+      {
+        "id": 3480884105,
+        "node_id": "LA_kwDOGRBhi87PehOJ",
+        "url": "https://api.github.com/repos/binwiederhier/ntfy/labels/enhancement",
+        "name": "enhancement",
+        "color": "a2eeef",
+        "default": true,
+        "description": "New feature or request"
+      }
+    ],
+    "state": "open",
+    "locked": false,
+    "assignee": null,
+    "assignees": [
+    ],
+    "milestone": null,
+    "comments": 3,
+    "created_at": "2025-07-15T03:46:30Z",
+    "updated_at": "2025-07-16T11:45:57Z",
+    "closed_at": null,
+    "author_association": "NONE",
+    "active_lock_reason": null,
+    "sub_issues_summary": {
+      "total": 0,
+      "completed": 0,
+      "percent_completed": 0
+    },
+    "body": "Hello ntfy Team,\n\nFirst off, thank you for developing such a powerful and lightweight notification app — it’s been invaluable for receiving timely alerts.\n\nI’m a user who relies heavily on ntfy for real-time trading alerts and have noticed that while push notifications arrive instantly, the in-app alert list does not automatically refresh with new messages. Currently, I need to manually pull-to-refresh the alert list to see the latest alerts.\n\nWould it be possible to add a feature that enables automatic refreshing of the alert list as new notifications arrive? This would greatly enhance usability and streamline the user experience, especially for users monitoring time-sensitive information.\n\nThank you for considering this request. I appreciate your hard work and look forward to future updates!",
+    "reactions": {
+      "url": "https://api.github.com/repos/binwiederhier/ntfy/issues/1389/reactions",
+      "total_count": 0,
+      "+1": 0,
+      "-1": 0,
+      "laugh": 0,
+      "hooray": 0,
+      "confused": 0,
+      "heart": 0,
+      "rocket": 0,
+      "eyes": 0
+    },
+    "timeline_url": "https://api.github.com/repos/binwiederhier/ntfy/issues/1389/timeline",
+    "performed_via_github_app": null,
+    "state_reason": null
+  },
+  "comment": {
+    "url": "https://api.github.com/repos/binwiederhier/ntfy/issues/comments/3078214289",
+    "html_url": "https://github.com/binwiederhier/ntfy/issues/1389#issuecomment-3078214289",
+    "issue_url": "https://api.github.com/repos/binwiederhier/ntfy/issues/1389",
+    "id": 3078214289,
+    "node_id": "IC_kwDOGRBhi863edKR",
+    "user": {
+      "login": "wunter8",
+      "id": 8421688,
+      "node_id": "MDQ6VXNlcjg0MjE2ODg=",
+      "avatar_url": "https://avatars.githubusercontent.com/u/8421688?v=4",
+      "gravatar_id": "",
+      "url": "https://api.github.com/users/wunter8",
+      "html_url": "https://github.com/wunter8",
+      "followers_url": "https://api.github.com/users/wunter8/followers",
+      "following_url": "https://api.github.com/users/wunter8/following{/other_user}",
+      "gists_url": "https://api.github.com/users/wunter8/gists{/gist_id}",
+      "starred_url": "https://api.github.com/users/wunter8/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/wunter8/subscriptions",
+      "organizations_url": "https://api.github.com/users/wunter8/orgs",
+      "repos_url": "https://api.github.com/users/wunter8/repos",
+      "events_url": "https://api.github.com/users/wunter8/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/wunter8/received_events",
+      "type": "User",
+      "user_view_type": "public",
+      "site_admin": false
+    },
+    "created_at": "2025-07-16T11:45:57Z",
+    "updated_at": "2025-07-16T11:45:57Z",
+    "author_association": "CONTRIBUTOR",
+    "body": "These are the things you need to do to get iOS push notifications to work:\n1. open a browser to the web app of your ntfy instance and copy the URL (including \"http://\" or \"https://\", your domain or IP address, and any ports, and excluding any trailing slashes)\n2. put the URL you copied in the ntfy `base-url` config in server.yml or NTFY_BASE_URL in env variables\n3. put the URL you copied in the default server URL setting in the iOS ntfy app\n4. set `upstream-base-url` in server.yml or NTFY_UPSTREAM_BASE_URL in env variables to \"https://ntfy.sh\" (without a trailing slash)",
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--- a/server/testdata/webhook_github_issue_opened.json
+++ b/server/testdata/webhook_github_issue_opened.json
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+    "body": ":lady_beetle: **Describe the bug**\nWhen sending a notification (especially when it happens with multiple requests) this error occurs\n\n:computer: **Components impacted**\nntfy server 2.13.0 in docker, debian 12 arm64\n\n:bulb: **Screenshots and/or logs**\n```\nclosed with HTTP 500 (ntfy error 50001) (error=database table is locked, http_method=POST, http_path=/_matrix/push/v1/notify, tag=http, visitor_auth_limiter_limit=0.016666666666666666, visitor_auth_limiter_tokens=30, visitor_id=ip:<edited>, visitor_ip=<edited>, visitor_messages=448, visitor_messages_limit=17280, visitor_messages_remaining=16832, visitor_request_limiter_limit=0.2, visitor_request_limiter_tokens=57.049697891799994, visitor_seen=2025-07-16T15:06:35.429Z)\n```\n\n:crystal_ball: **Additional context**\nLooks like this has already been fixed by #498, regression?\n",
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+    "maintainer_can_modify": false,
+    "commits": 7,
+    "additions": 5506,
+    "deletions": 42,
+    "changed_files": 58
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+  "repository": {
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+    "node_id": "R_kgDOGRBhiw",
+    "name": "ntfy",
+    "full_name": "binwiederhier/ntfy",
+    "private": false,
+    "owner": {
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+      "id": 664597,
+      "node_id": "MDQ6VXNlcjY2NDU5Nw==",
+      "avatar_url": "https://avatars.githubusercontent.com/u/664597?v=4",
+      "gravatar_id": "",
+      "url": "https://api.github.com/users/binwiederhier",
+      "html_url": "https://github.com/binwiederhier",
+      "followers_url": "https://api.github.com/users/binwiederhier/followers",
+      "following_url": "https://api.github.com/users/binwiederhier/following{/other_user}",
+      "gists_url": "https://api.github.com/users/binwiederhier/gists{/gist_id}",
+      "starred_url": "https://api.github.com/users/binwiederhier/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/binwiederhier/subscriptions",
+      "organizations_url": "https://api.github.com/users/binwiederhier/orgs",
+      "repos_url": "https://api.github.com/users/binwiederhier/repos",
+      "events_url": "https://api.github.com/users/binwiederhier/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/binwiederhier/received_events",
+      "type": "User",
+      "user_view_type": "public",
+      "site_admin": false
+    },
+    "html_url": "https://github.com/binwiederhier/ntfy",
+    "description": "Send push notifications to your phone or desktop using PUT/POST",
+    "fork": false,
+    "url": "https://api.github.com/repos/binwiederhier/ntfy",
+    "forks_url": "https://api.github.com/repos/binwiederhier/ntfy/forks",
+    "keys_url": "https://api.github.com/repos/binwiederhier/ntfy/keys{/key_id}",
+    "collaborators_url": "https://api.github.com/repos/binwiederhier/ntfy/collaborators{/collaborator}",
+    "teams_url": "https://api.github.com/repos/binwiederhier/ntfy/teams",
+    "hooks_url": "https://api.github.com/repos/binwiederhier/ntfy/hooks",
+    "issue_events_url": "https://api.github.com/repos/binwiederhier/ntfy/issues/events{/number}",
+    "events_url": "https://api.github.com/repos/binwiederhier/ntfy/events",
+    "assignees_url": "https://api.github.com/repos/binwiederhier/ntfy/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/binwiederhier/ntfy/branches{/branch}",
+    "tags_url": "https://api.github.com/repos/binwiederhier/ntfy/tags",
+    "blobs_url": "https://api.github.com/repos/binwiederhier/ntfy/git/blobs{/sha}",
+    "git_tags_url": "https://api.github.com/repos/binwiederhier/ntfy/git/tags{/sha}",
+    "git_refs_url": "https://api.github.com/repos/binwiederhier/ntfy/git/refs{/sha}",
+    "trees_url": "https://api.github.com/repos/binwiederhier/ntfy/git/trees{/sha}",
+    "statuses_url": "https://api.github.com/repos/binwiederhier/ntfy/statuses/{sha}",
+    "languages_url": "https://api.github.com/repos/binwiederhier/ntfy/languages",
+    "stargazers_url": "https://api.github.com/repos/binwiederhier/ntfy/stargazers",
+    "contributors_url": "https://api.github.com/repos/binwiederhier/ntfy/contributors",
+    "subscribers_url": "https://api.github.com/repos/binwiederhier/ntfy/subscribers",
+    "subscription_url": "https://api.github.com/repos/binwiederhier/ntfy/subscription",
+    "commits_url": "https://api.github.com/repos/binwiederhier/ntfy/commits{/sha}",
+    "git_commits_url": "https://api.github.com/repos/binwiederhier/ntfy/git/commits{/sha}",
+    "comments_url": "https://api.github.com/repos/binwiederhier/ntfy/comments{/number}",
+    "issue_comment_url": "https://api.github.com/repos/binwiederhier/ntfy/issues/comments{/number}",
+    "contents_url": "https://api.github.com/repos/binwiederhier/ntfy/contents/{+path}",
+    "compare_url": "https://api.github.com/repos/binwiederhier/ntfy/compare/{base}...{head}",
+    "merges_url": "https://api.github.com/repos/binwiederhier/ntfy/merges",
+    "archive_url": "https://api.github.com/repos/binwiederhier/ntfy/{archive_format}{/ref}",
+    "downloads_url": "https://api.github.com/repos/binwiederhier/ntfy/downloads",
+    "issues_url": "https://api.github.com/repos/binwiederhier/ntfy/issues{/number}",
+    "pulls_url": "https://api.github.com/repos/binwiederhier/ntfy/pulls{/number}",
+    "milestones_url": "https://api.github.com/repos/binwiederhier/ntfy/milestones{/number}",
+    "notifications_url": "https://api.github.com/repos/binwiederhier/ntfy/notifications{?since,all,participating}",
+    "labels_url": "https://api.github.com/repos/binwiederhier/ntfy/labels{/name}",
+    "releases_url": "https://api.github.com/repos/binwiederhier/ntfy/releases{/id}",
+    "deployments_url": "https://api.github.com/repos/binwiederhier/ntfy/deployments",
+    "created_at": "2021-10-23T19:25:32Z",
+    "updated_at": "2025-07-16T10:18:34Z",
+    "pushed_at": "2025-07-16T11:49:26Z",
+    "git_url": "git://github.com/binwiederhier/ntfy.git",
+    "ssh_url": "git@github.com:binwiederhier/ntfy.git",
+    "clone_url": "https://github.com/binwiederhier/ntfy.git",
+    "svn_url": "https://github.com/binwiederhier/ntfy",
+    "homepage": "https://ntfy.sh",
+    "size": 36740,
+    "stargazers_count": 25111,
+    "watchers_count": 25111,
+    "language": "Go",
+    "has_issues": true,
+    "has_projects": true,
+    "has_downloads": true,
+    "has_wiki": true,
+    "has_pages": false,
+    "has_discussions": false,
+    "forks_count": 984,
+    "mirror_url": null,
+    "archived": false,
+    "disabled": false,
+    "open_issues_count": 368,
+    "license": {
+      "key": "apache-2.0",
+      "name": "Apache License 2.0",
+      "spdx_id": "Apache-2.0",
+      "url": "https://api.github.com/licenses/apache-2.0",
+      "node_id": "MDc6TGljZW5zZTI="
+    },
+    "allow_forking": true,
+    "is_template": false,
+    "web_commit_signoff_required": false,
+    "topics": [
+      "curl",
+      "notifications",
+      "ntfy",
+      "ntfysh",
+      "pubsub",
+      "push-notifications",
+      "rest-api"
+    ],
+    "visibility": "public",
+    "forks": 984,
+    "open_issues": 368,
+    "watchers": 25111,
+    "default_branch": "main"
+  },
+  "sender": {
+    "login": "binwiederhier",
+    "id": 664597,
+    "node_id": "MDQ6VXNlcjY2NDU5Nw==",
+    "avatar_url": "https://avatars.githubusercontent.com/u/664597?v=4",
+    "gravatar_id": "",
+    "url": "https://api.github.com/users/binwiederhier",
+    "html_url": "https://github.com/binwiederhier",
+    "followers_url": "https://api.github.com/users/binwiederhier/followers",
+    "following_url": "https://api.github.com/users/binwiederhier/following{/other_user}",
+    "gists_url": "https://api.github.com/users/binwiederhier/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/binwiederhier/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/binwiederhier/subscriptions",
+    "organizations_url": "https://api.github.com/users/binwiederhier/orgs",
+    "repos_url": "https://api.github.com/users/binwiederhier/repos",
+    "events_url": "https://api.github.com/users/binwiederhier/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/binwiederhier/received_events",
+    "type": "User",
+    "user_view_type": "public",
+    "site_admin": false
+  }
+}
--- a/server/testdata/webhook_github_star_created.json
+++ b/server/testdata/webhook_github_star_created.json
@@ -0,0 +1,141 @@
+{
+  "action": "created",
+  "starred_at": "2025-07-16T12:57:43Z",
+  "repository": {
+    "id": 420503947,
+    "node_id": "R_kgDOGRBhiw",
+    "name": "ntfy",
+    "full_name": "binwiederhier/ntfy",
+    "private": false,
+    "owner": {
+      "login": "binwiederhier",
+      "id": 664597,
+      "node_id": "MDQ6VXNlcjY2NDU5Nw==",
+      "avatar_url": "https://avatars.githubusercontent.com/u/664597?v=4",
+      "gravatar_id": "",
+      "url": "https://api.github.com/users/binwiederhier",
+      "html_url": "https://github.com/binwiederhier",
+      "followers_url": "https://api.github.com/users/binwiederhier/followers",
+      "following_url": "https://api.github.com/users/binwiederhier/following{/other_user}",
+      "gists_url": "https://api.github.com/users/binwiederhier/gists{/gist_id}",
+      "starred_url": "https://api.github.com/users/binwiederhier/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/binwiederhier/subscriptions",
+      "organizations_url": "https://api.github.com/users/binwiederhier/orgs",
+      "repos_url": "https://api.github.com/users/binwiederhier/repos",
+      "events_url": "https://api.github.com/users/binwiederhier/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/binwiederhier/received_events",
+      "type": "User",
+      "user_view_type": "public",
+      "site_admin": false
+    },
+    "html_url": "https://github.com/binwiederhier/ntfy",
+    "description": "Send push notifications to your phone or desktop using PUT/POST",
+    "fork": false,
+    "url": "https://api.github.com/repos/binwiederhier/ntfy",
+    "forks_url": "https://api.github.com/repos/binwiederhier/ntfy/forks",
+    "keys_url": "https://api.github.com/repos/binwiederhier/ntfy/keys{/key_id}",
+    "collaborators_url": "https://api.github.com/repos/binwiederhier/ntfy/collaborators{/collaborator}",
+    "teams_url": "https://api.github.com/repos/binwiederhier/ntfy/teams",
+    "hooks_url": "https://api.github.com/repos/binwiederhier/ntfy/hooks",
+    "issue_events_url": "https://api.github.com/repos/binwiederhier/ntfy/issues/events{/number}",
+    "events_url": "https://api.github.com/repos/binwiederhier/ntfy/events",
+    "assignees_url": "https://api.github.com/repos/binwiederhier/ntfy/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/binwiederhier/ntfy/branches{/branch}",
+    "tags_url": "https://api.github.com/repos/binwiederhier/ntfy/tags",
+    "blobs_url": "https://api.github.com/repos/binwiederhier/ntfy/git/blobs{/sha}",
+    "git_tags_url": "https://api.github.com/repos/binwiederhier/ntfy/git/tags{/sha}",
+    "git_refs_url": "https://api.github.com/repos/binwiederhier/ntfy/git/refs{/sha}",
+    "trees_url": "https://api.github.com/repos/binwiederhier/ntfy/git/trees{/sha}",
+    "statuses_url": "https://api.github.com/repos/binwiederhier/ntfy/statuses/{sha}",
+    "languages_url": "https://api.github.com/repos/binwiederhier/ntfy/languages",
+    "stargazers_url": "https://api.github.com/repos/binwiederhier/ntfy/stargazers",
+    "contributors_url": "https://api.github.com/repos/binwiederhier/ntfy/contributors",
+    "subscribers_url": "https://api.github.com/repos/binwiederhier/ntfy/subscribers",
+    "subscription_url": "https://api.github.com/repos/binwiederhier/ntfy/subscription",
+    "commits_url": "https://api.github.com/repos/binwiederhier/ntfy/commits{/sha}",
+    "git_commits_url": "https://api.github.com/repos/binwiederhier/ntfy/git/commits{/sha}",
+    "comments_url": "https://api.github.com/repos/binwiederhier/ntfy/comments{/number}",
+    "issue_comment_url": "https://api.github.com/repos/binwiederhier/ntfy/issues/comments{/number}",
+    "contents_url": "https://api.github.com/repos/binwiederhier/ntfy/contents/{+path}",
+    "compare_url": "https://api.github.com/repos/binwiederhier/ntfy/compare/{base}...{head}",
+    "merges_url": "https://api.github.com/repos/binwiederhier/ntfy/merges",
+    "archive_url": "https://api.github.com/repos/binwiederhier/ntfy/{archive_format}{/ref}",
+    "downloads_url": "https://api.github.com/repos/binwiederhier/ntfy/downloads",
+    "issues_url": "https://api.github.com/repos/binwiederhier/ntfy/issues{/number}",
+    "pulls_url": "https://api.github.com/repos/binwiederhier/ntfy/pulls{/number}",
+    "milestones_url": "https://api.github.com/repos/binwiederhier/ntfy/milestones{/number}",
+    "notifications_url": "https://api.github.com/repos/binwiederhier/ntfy/notifications{?since,all,participating}",
+    "labels_url": "https://api.github.com/repos/binwiederhier/ntfy/labels{/name}",
+    "releases_url": "https://api.github.com/repos/binwiederhier/ntfy/releases{/id}",
+    "deployments_url": "https://api.github.com/repos/binwiederhier/ntfy/deployments",
+    "created_at": "2021-10-23T19:25:32Z",
+    "updated_at": "2025-07-16T12:57:43Z",
+    "pushed_at": "2025-07-16T11:49:26Z",
+    "git_url": "git://github.com/binwiederhier/ntfy.git",
+    "ssh_url": "git@github.com:binwiederhier/ntfy.git",
+    "clone_url": "https://github.com/binwiederhier/ntfy.git",
+    "svn_url": "https://github.com/binwiederhier/ntfy",
+    "homepage": "https://ntfy.sh",
+    "size": 36831,
+    "stargazers_count": 25112,
+    "watchers_count": 25112,
+    "language": "Go",
+    "has_issues": true,
+    "has_projects": true,
+    "has_downloads": true,
+    "has_wiki": true,
+    "has_pages": false,
+    "has_discussions": false,
+    "forks_count": 984,
+    "mirror_url": null,
+    "archived": false,
+    "disabled": false,
+    "open_issues_count": 368,
+    "license": {
+      "key": "apache-2.0",
+      "name": "Apache License 2.0",
+      "spdx_id": "Apache-2.0",
+      "url": "https://api.github.com/licenses/apache-2.0",
+      "node_id": "MDc6TGljZW5zZTI="
+    },
+    "allow_forking": true,
+    "is_template": false,
+    "web_commit_signoff_required": false,
+    "topics": [
+      "curl",
+      "notifications",
+      "ntfy",
+      "ntfysh",
+      "pubsub",
+      "push-notifications",
+      "rest-api"
+    ],
+    "visibility": "public",
+    "forks": 984,
+    "open_issues": 368,
+    "watchers": 25112,
+    "default_branch": "main"
+  },
+  "sender": {
+    "login": "mbilby",
+    "id": 51273322,
+    "node_id": "MDQ6VXNlcjUxMjczMzIy",
+    "avatar_url": "https://avatars.githubusercontent.com/u/51273322?v=4",
+    "gravatar_id": "",
+    "url": "https://api.github.com/users/mbilby",
+    "html_url": "https://github.com/mbilby",
+    "followers_url": "https://api.github.com/users/mbilby/followers",
+    "following_url": "https://api.github.com/users/mbilby/following{/other_user}",
+    "gists_url": "https://api.github.com/users/mbilby/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/mbilby/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/mbilby/subscriptions",
+    "organizations_url": "https://api.github.com/users/mbilby/orgs",
+    "repos_url": "https://api.github.com/users/mbilby/repos",
+    "events_url": "https://api.github.com/users/mbilby/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/mbilby/received_events",
+    "type": "User",
+    "user_view_type": "public",
+    "site_admin": false
+  }
+}
+
--- a/server/testdata/webhook_github_watch_created.json
+++ b/server/testdata/webhook_github_watch_created.json
@@ -0,0 +1,139 @@
+{
+  "action": "started",
+  "repository": {
+    "id": 420503947,
+    "node_id": "R_kgDOGRBhiw",
+    "name": "ntfy",
+    "full_name": "binwiederhier/ntfy",
+    "private": false,
+    "owner": {
+      "login": "binwiederhier",
+      "id": 664597,
+      "node_id": "MDQ6VXNlcjY2NDU5Nw==",
+      "avatar_url": "https://avatars.githubusercontent.com/u/664597?v=4",
+      "gravatar_id": "",
+      "url": "https://api.github.com/users/binwiederhier",
+      "html_url": "https://github.com/binwiederhier",
+      "followers_url": "https://api.github.com/users/binwiederhier/followers",
+      "following_url": "https://api.github.com/users/binwiederhier/following{/other_user}",
+      "gists_url": "https://api.github.com/users/binwiederhier/gists{/gist_id}",
+      "starred_url": "https://api.github.com/users/binwiederhier/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/binwiederhier/subscriptions",
+      "organizations_url": "https://api.github.com/users/binwiederhier/orgs",
+      "repos_url": "https://api.github.com/users/binwiederhier/repos",
+      "events_url": "https://api.github.com/users/binwiederhier/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/binwiederhier/received_events",
+      "type": "User",
+      "user_view_type": "public",
+      "site_admin": false
+    },
+    "html_url": "https://github.com/binwiederhier/ntfy",
+    "description": "Send push notifications to your phone or desktop using PUT/POST",
+    "fork": false,
+    "url": "https://api.github.com/repos/binwiederhier/ntfy",
+    "forks_url": "https://api.github.com/repos/binwiederhier/ntfy/forks",
+    "keys_url": "https://api.github.com/repos/binwiederhier/ntfy/keys{/key_id}",
+    "collaborators_url": "https://api.github.com/repos/binwiederhier/ntfy/collaborators{/collaborator}",
+    "teams_url": "https://api.github.com/repos/binwiederhier/ntfy/teams",
+    "hooks_url": "https://api.github.com/repos/binwiederhier/ntfy/hooks",
+    "issue_events_url": "https://api.github.com/repos/binwiederhier/ntfy/issues/events{/number}",
+    "events_url": "https://api.github.com/repos/binwiederhier/ntfy/events",
+    "assignees_url": "https://api.github.com/repos/binwiederhier/ntfy/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/binwiederhier/ntfy/branches{/branch}",
+    "tags_url": "https://api.github.com/repos/binwiederhier/ntfy/tags",
+    "blobs_url": "https://api.github.com/repos/binwiederhier/ntfy/git/blobs{/sha}",
+    "git_tags_url": "https://api.github.com/repos/binwiederhier/ntfy/git/tags{/sha}",
+    "git_refs_url": "https://api.github.com/repos/binwiederhier/ntfy/git/refs{/sha}",
+    "trees_url": "https://api.github.com/repos/binwiederhier/ntfy/git/trees{/sha}",
+    "statuses_url": "https://api.github.com/repos/binwiederhier/ntfy/statuses/{sha}",
+    "languages_url": "https://api.github.com/repos/binwiederhier/ntfy/languages",
+    "stargazers_url": "https://api.github.com/repos/binwiederhier/ntfy/stargazers",
+    "contributors_url": "https://api.github.com/repos/binwiederhier/ntfy/contributors",
+    "subscribers_url": "https://api.github.com/repos/binwiederhier/ntfy/subscribers",
+    "subscription_url": "https://api.github.com/repos/binwiederhier/ntfy/subscription",
+    "commits_url": "https://api.github.com/repos/binwiederhier/ntfy/commits{/sha}",
+    "git_commits_url": "https://api.github.com/repos/binwiederhier/ntfy/git/commits{/sha}",
+    "comments_url": "https://api.github.com/repos/binwiederhier/ntfy/comments{/number}",
+    "issue_comment_url": "https://api.github.com/repos/binwiederhier/ntfy/issues/comments{/number}",
+    "contents_url": "https://api.github.com/repos/binwiederhier/ntfy/contents/{+path}",
+    "compare_url": "https://api.github.com/repos/binwiederhier/ntfy/compare/{base}...{head}",
+    "merges_url": "https://api.github.com/repos/binwiederhier/ntfy/merges",
+    "archive_url": "https://api.github.com/repos/binwiederhier/ntfy/{archive_format}{/ref}",
+    "downloads_url": "https://api.github.com/repos/binwiederhier/ntfy/downloads",
+    "issues_url": "https://api.github.com/repos/binwiederhier/ntfy/issues{/number}",
+    "pulls_url": "https://api.github.com/repos/binwiederhier/ntfy/pulls{/number}",
+    "milestones_url": "https://api.github.com/repos/binwiederhier/ntfy/milestones{/number}",
+    "notifications_url": "https://api.github.com/repos/binwiederhier/ntfy/notifications{?since,all,participating}",
+    "labels_url": "https://api.github.com/repos/binwiederhier/ntfy/labels{/name}",
+    "releases_url": "https://api.github.com/repos/binwiederhier/ntfy/releases{/id}",
+    "deployments_url": "https://api.github.com/repos/binwiederhier/ntfy/deployments",
+    "created_at": "2021-10-23T19:25:32Z",
+    "updated_at": "2025-07-16T12:57:43Z",
+    "pushed_at": "2025-07-16T11:49:26Z",
+    "git_url": "git://github.com/binwiederhier/ntfy.git",
+    "ssh_url": "git@github.com:binwiederhier/ntfy.git",
+    "clone_url": "https://github.com/binwiederhier/ntfy.git",
+    "svn_url": "https://github.com/binwiederhier/ntfy",
+    "homepage": "https://ntfy.sh",
+    "size": 36831,
+    "stargazers_count": 25112,
+    "watchers_count": 25112,
+    "language": "Go",
+    "has_issues": true,
+    "has_projects": true,
+    "has_downloads": true,
+    "has_wiki": true,
+    "has_pages": false,
+    "has_discussions": false,
+    "forks_count": 984,
+    "mirror_url": null,
+    "archived": false,
+    "disabled": false,
+    "open_issues_count": 368,
+    "license": {
+      "key": "apache-2.0",
+      "name": "Apache License 2.0",
+      "spdx_id": "Apache-2.0",
+      "url": "https://api.github.com/licenses/apache-2.0",
+      "node_id": "MDc6TGljZW5zZTI="
+    },
+    "allow_forking": true,
+    "is_template": false,
+    "web_commit_signoff_required": false,
+    "topics": [
+      "curl",
+      "notifications",
+      "ntfy",
+      "ntfysh",
+      "pubsub",
+      "push-notifications",
+      "rest-api"
+    ],
+    "visibility": "public",
+    "forks": 984,
+    "open_issues": 368,
+    "watchers": 25112,
+    "default_branch": "main"
+  },
+  "sender": {
+    "login": "mbilby",
+    "id": 51273322,
+    "node_id": "MDQ6VXNlcjUxMjczMzIy",
+    "avatar_url": "https://avatars.githubusercontent.com/u/51273322?v=4",
+    "gravatar_id": "",
+    "url": "https://api.github.com/users/mbilby",
+    "html_url": "https://github.com/mbilby",
+    "followers_url": "https://api.github.com/users/mbilby/followers",
+    "following_url": "https://api.github.com/users/mbilby/following{/other_user}",
+    "gists_url": "https://api.github.com/users/mbilby/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/mbilby/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/mbilby/subscriptions",
+    "organizations_url": "https://api.github.com/users/mbilby/orgs",
+    "repos_url": "https://api.github.com/users/mbilby/repos",
+    "events_url": "https://api.github.com/users/mbilby/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/mbilby/received_events",
+    "type": "User",
+    "user_view_type": "public",
+    "site_admin": false
+  }
+}
--- a/server/testdata/webhook_grafana_resolved.json
+++ b/server/testdata/webhook_grafana_resolved.json
@@ -0,0 +1,51 @@
+{
+  "receiver": "ntfy\\.example\\.com/alerts",
+  "status": "resolved",
+  "alerts": [
+    {
+      "status": "resolved",
+      "labels": {
+        "alertname": "Load avg 15m too high",
+        "grafana_folder": "Node alerts",
+        "instance": "10.108.0.2:9100",
+        "job": "node-exporter"
+      },
+      "annotations": {
+        "summary": "15m load average too high"
+      },
+      "startsAt": "2024-03-15T02:28:00Z",
+      "endsAt": "2024-03-15T02:42:00Z",
+      "generatorURL": "localhost:3000/alerting/grafana/NW9oDw-4z/view",
+      "fingerprint": "becbfb94bd81ef48",
+      "silenceURL": "localhost:3000/alerting/silence/new?alertmanager=grafana&matcher=alertname%3DLoad+avg+15m+too+high&matcher=grafana_folder%3DNode+alerts&matcher=instance%3D10.108.0.2%3A9100&matcher=job%3Dnode-exporter",
+      "dashboardURL": "",
+      "panelURL": "",
+      "values": {
+        "B": 18.98211314475876,
+        "C": 0
+      },
+      "valueString": "[ var='B' labels={__name__=node_load15, instance=10.108.0.2:9100, job=node-exporter} value=18.98211314475876 ], [ var='C' labels={__name__=node_load15, instance=10.108.0.2:9100, job=node-exporter} value=0 ]"
+    }
+  ],
+  "groupLabels": {
+    "alertname": "Load avg 15m too high",
+    "grafana_folder": "Node alerts"
+  },
+  "commonLabels": {
+    "alertname": "Load avg 15m too high",
+    "grafana_folder": "Node alerts",
+    "instance": "10.108.0.2:9100",
+    "job": "node-exporter"
+  },
+  "commonAnnotations": {
+    "summary": "15m load average too high"
+  },
+  "externalURL": "localhost:3000/",
+  "version": "1",
+  "groupKey": "{}:{alertname=\"Load avg 15m too high\", grafana_folder=\"Node alerts\"}",
+  "truncatedAlerts": 0,
+  "orgId": 1,
+  "title": "[RESOLVED] Load avg 15m too high Node alerts (10.108.0.2:9100 node-exporter)",
+  "state": "ok",
+  "message": "**Resolved**\n\nValue: B=18.98211314475876, C=0\nLabels:\n - alertname = Load avg 15m too high\n - grafana_folder = Node alerts\n - instance = 10.108.0.2:9100\n - job = node-exporter\n"
+}
--- a/server/types.go
+++ b/server/types.go
@@ -7,7 +7,6 @@ import (

 	"heckel.io/ntfy/v2/log"
 	"heckel.io/ntfy/v2/user"
-
 	"heckel.io/ntfy/v2/util"
 )

@@ -246,6 +245,51 @@ func (q *queryFilter) Pass(msg *message) bool {
 	return true
 }

+// templateMode represents the mode in which templates are used
+//
+// It can be
+// - empty: templating is disabled
+// - a boolean string (yes/1/true/no/0/false): inline-templating mode
+// - a filename (e.g. grafana): template mode with a file
+type templateMode string
+
+// Enabled returns true if templating is enabled
+func (t templateMode) Enabled() bool {
+	return t != ""
+}
+
+// InlineMode returns true if inline-templating mode is enabled
+func (t templateMode) InlineMode() bool {
+	return t.Enabled() && isBoolValue(string(t))
+}
+
+// FileMode returns true if file-templating mode is enabled
+func (t templateMode) FileMode() bool {
+	return t.Enabled() && !isBoolValue(string(t))
+}
+
+// FileName returns the filename if file-templating mode is enabled, or an empty string otherwise
+func (t templateMode) FileName() string {
+	if t.FileMode() {
+		return string(t)
+	}
+	return ""
+}
+
+// templateFile represents a template file with title and message
+// It is used for file-based templates, e.g. grafana, influxdb, etc.
+//
+// Example YAML:
+//
+//	  title: "Alert: {{ .Title }}"
+//	  message: |
+//		   This is a {{ .Type }} alert.
+//		   It can be multiline.
+type templateFile struct {
+	Title   *string `yaml:"title"`
+	Message *string `yaml:"message"`
+}
+
 type apiHealthResponse struct {
 	Healthy bool `json:"healthy"`
 }
@@ -316,11 +360,12 @@ type apiAccountTokenUpdateRequest struct {
 }

 type apiAccountTokenResponse struct {
-	Token      string `json:"token"`
-	Label      string `json:"label,omitempty"`
-	LastAccess int64  `json:"last_access,omitempty"`
-	LastOrigin string `json:"last_origin,omitempty"`
-	Expires    int64  `json:"expires,omitempty"` // Unix timestamp
+	Token       string `json:"token"`
+	Label       string `json:"label,omitempty"`
+	LastAccess  int64  `json:"last_access,omitempty"`
+	LastOrigin  string `json:"last_origin,omitempty"`
+	Expires     int64  `json:"expires,omitempty"`     // Unix timestamp
+	Provisioned bool   `json:"provisioned,omitempty"` // True if this token was provisioned by the server config
 }

 type apiAccountPhoneNumberVerifyRequest struct {
@@ -382,6 +427,7 @@ type apiAccountResponse struct {
 	Username      string                     `json:"username"`
 	Role          string                     `json:"role,omitempty"`
 	SyncTopic     string                     `json:"sync_topic,omitempty"`
+	Provisioned   bool                       `json:"provisioned,omitempty"`
 	Language      string                     `json:"language,omitempty"`
 	Notification  *user.NotificationPrefs    `json:"notification,omitempty"`
 	Subscriptions []*user.Subscription       `json:"subscriptions,omitempty"`
--- a/server/util.go
+++ b/server/util.go
@@ -4,14 +4,14 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"heckel.io/ntfy/v2/util"
 	"io"
 	"mime"
 	"net/http"
 	"net/netip"
 	"regexp"
-	"slices"
 	"strings"
+
+	"heckel.io/ntfy/v2/util"
 )

 var (
@@ -20,8 +20,14 @@ var (
 	// priorityHeaderIgnoreRegex matches specific patterns of the "Priority" header (RFC 9218), so that it can be ignored
 	priorityHeaderIgnoreRegex = regexp.MustCompile(`^u=\d,\s*(i|\d)$|^u=\d$`)

-	// forwardedHeaderRegex parses IPv4 addresses from the "Forwarded" header (RFC 7239)
-	forwardedHeaderRegex = regexp.MustCompile(`(?i)\bfor="?(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})"?`)
+	// forwardedHeaderRegex parses IPv4 and IPv6 addresses from the "Forwarded" header (RFC 7239)
+	// IPv6 addresses in Forwarded header are enclosed in square brackets. The port is optional.
+	//
+	// Examples:
+	//  for="1.2.3.4"
+	//  for="[2001:db8::1]"; for=1.2.3.4:8080, by=phil
+	//  for="1.2.3.4:8080"
+	forwardedHeaderRegex = regexp.MustCompile(`(?i)\bfor="?(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}|\[[0-9a-f:]+])(?::\d+)?"?`)
 )

 func readBoolParam(r *http.Request, defaultValue bool, names ...string) bool {
@@ -77,9 +83,9 @@ func readQueryParam(r *http.Request, names ...string) string {

 // extractIPAddress extracts the IP address of the visitor from the request,
 // either from the TCP socket or from a proxy header.
-func extractIPAddress(r *http.Request, behindProxy bool, proxyForwardedHeader string, proxyTrustedAddresses []string) netip.Addr {
+func extractIPAddress(r *http.Request, behindProxy bool, proxyForwardedHeader string, proxyTrustedPrefixes []netip.Prefix) netip.Addr {
 	if behindProxy && proxyForwardedHeader != "" {
-		if addr, err := extractIPAddressFromHeader(r, proxyForwardedHeader, proxyTrustedAddresses); err == nil {
+		if addr, err := extractIPAddressFromHeader(r, proxyForwardedHeader, proxyTrustedPrefixes); err == nil {
 			return addr
 		}
 		// Fall back to the remote address if the header is not found or invalid
@@ -102,7 +108,7 @@ func extractIPAddress(r *http.Request, behindProxy bool, proxyForwardedHeader st
 // If there are multiple addresses, we first remove the trusted IP addresses from the list, and
 // then take the right-most address in the list (as this is the one added by our proxy server).
 // See https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-For for details.
-func extractIPAddressFromHeader(r *http.Request, forwardedHeader string, trustedAddresses []string) (netip.Addr, error) {
+func extractIPAddressFromHeader(r *http.Request, forwardedHeader string, trustedPrefixes []netip.Prefix) (netip.Addr, error) {
 	value := strings.TrimSpace(strings.ToLower(r.Header.Get(forwardedHeader)))
 	if value == "" {
 		return netip.IPv4Unspecified(), fmt.Errorf("no %s header found", forwardedHeader)
@@ -111,17 +117,27 @@ func extractIPAddressFromHeader(r *http.Request, forwardedHeader string, trusted
 	addrsStrs := util.Map(util.SplitNoEmpty(value, ","), strings.TrimSpace)
 	var validAddrs []netip.Addr
 	for _, addrStr := range addrsStrs {
-		if addr, err := netip.ParseAddr(addrStr); err == nil {
-			validAddrs = append(validAddrs, addr)
-		} else if m := forwardedHeaderRegex.FindStringSubmatch(addrStr); len(m) == 2 {
-			if addr, err := netip.ParseAddr(m[1]); err == nil {
+		// Handle Forwarded header with for="[IPv6]" or for="IPv4"
+		if m := forwardedHeaderRegex.FindStringSubmatch(addrStr); len(m) == 2 {
+			addrRaw := m[1]
+			if strings.HasPrefix(addrRaw, "[") && strings.HasSuffix(addrRaw, "]") {
+				addrRaw = addrRaw[1 : len(addrRaw)-1]
+			}
+			if addr, err := netip.ParseAddr(addrRaw); err == nil {
 				validAddrs = append(validAddrs, addr)
 			}
+		} else if addr, err := netip.ParseAddr(addrStr); err == nil {
+			validAddrs = append(validAddrs, addr)
 		}
 	}
 	// Filter out proxy addresses
 	clientAddrs := util.Filter(validAddrs, func(addr netip.Addr) bool {
-		return !slices.Contains(trustedAddresses, addr.String())
+		for _, prefix := range trustedPrefixes {
+			if prefix.Contains(addr) {
+				return false // Address is in the trusted range, ignore it
+			}
+		}
+		return true
 	})
 	if len(clientAddrs) == 0 {
 		return netip.IPv4Unspecified(), fmt.Errorf("no client IP address found in %s header: %s", forwardedHeader, value)
--- a/server/util_test.go
+++ b/server/util_test.go
@@ -4,10 +4,13 @@ import (
 	"bytes"
 	"crypto/rand"
 	"fmt"
-	"github.com/stretchr/testify/require"
+	"heckel.io/ntfy/v2/user"
 	"net/http"
+	"net/netip"
 	"strings"
 	"testing"
+
+	"github.com/stretchr/testify/require"
 )

 func TestReadBoolParam(t *testing.T) {
@@ -97,7 +100,7 @@ func TestExtractIPAddress(t *testing.T) {
 	r.Header.Set("X-Real-IP", "13.14.15.16, 1.1.1.1")
 	r.Header.Set("Forwarded", "for=17.18.19.20;by=proxy.example.com, by=2.2.2.2;for=1.1.1.1")

-	trustedProxies := []string{"1.1.1.1"}
+	trustedProxies := []netip.Prefix{netip.MustParsePrefix("1.1.1.1/32")}

 	require.Equal(t, "5.6.7.8", extractIPAddress(r, true, "X-Forwarded-For", trustedProxies).String())
 	require.Equal(t, "9.10.11.12", extractIPAddress(r, true, "X-Client-IP", trustedProxies).String())
@@ -112,9 +115,50 @@ func TestExtractIPAddress_UnixSocket(t *testing.T) {
 	r.Header.Set("X-Forwarded-For", "1.2.3.4, 5.6.7.8, 1.1.1.1")
 	r.Header.Set("Forwarded", "by=bla.example.com;for=17.18.19.20")

-	trustedProxies := []string{"1.1.1.1"}
+	trustedProxies := []netip.Prefix{netip.MustParsePrefix("1.1.1.1/32")}

 	require.Equal(t, "5.6.7.8", extractIPAddress(r, true, "X-Forwarded-For", trustedProxies).String())
 	require.Equal(t, "17.18.19.20", extractIPAddress(r, true, "Forwarded", trustedProxies).String())
 	require.Equal(t, "0.0.0.0", extractIPAddress(r, false, "X-Forwarded-For", trustedProxies).String())
 }
+
+func TestExtractIPAddress_MixedIPv4IPv6(t *testing.T) {
+	r, _ := http.NewRequest("GET", "http://ntfy.sh/mytopic/json?since=all", nil)
+	r.RemoteAddr = "[2001:db8:abcd::1]:1234"
+	r.Header.Set("X-Forwarded-For", "1.2.3.4, 2001:db8:abcd::2, 5.6.7.8")
+	trustedProxies := []netip.Prefix{netip.MustParsePrefix("1.2.3.0/24")}
+	require.Equal(t, "5.6.7.8", extractIPAddress(r, true, "X-Forwarded-For", trustedProxies).String())
+}
+
+func TestExtractIPAddress_TrustedIPv6Prefix(t *testing.T) {
+	r, _ := http.NewRequest("GET", "http://ntfy.sh/mytopic/json?since=all", nil)
+	r.RemoteAddr = "[2001:db8:abcd::1]:1234"
+	r.Header.Set("X-Forwarded-For", "2001:db8:aaaa::1, 2001:db8:aaaa::2, 2001:db8:abcd:2::3")
+	trustedProxies := []netip.Prefix{netip.MustParsePrefix("2001:db8:aaaa::/48")}
+	require.Equal(t, "2001:db8:abcd:2::3", extractIPAddress(r, true, "X-Forwarded-For", trustedProxies).String())
+}
+
+func TestVisitorID(t *testing.T) {
+	confWithDefaults := &Config{
+		VisitorPrefixBitsIPv4: 32,
+		VisitorPrefixBitsIPv6: 64,
+	}
+	confWithShortenedPrefixes := &Config{
+		VisitorPrefixBitsIPv4: 16,
+		VisitorPrefixBitsIPv6: 56,
+	}
+	userWithTier := &user.User{
+		ID:   "u_123",
+		Tier: &user.Tier{},
+	}
+	require.Equal(t, "ip:1.2.3.4", visitorID(netip.MustParseAddr("1.2.3.4"), nil, confWithDefaults))
+	require.Equal(t, "ip:2a01:599:b26:2397::", visitorID(netip.MustParseAddr("2a01:599:b26:2397:dbe7:5aa2:95ce:1e83"), nil, confWithDefaults))
+	require.Equal(t, "ip:2001:db8:25:86::", visitorID(netip.MustParseAddr("2001:db8:25:86:1::1"), nil, confWithDefaults))
+	require.Equal(t, "ip:2001:db8:25:86::", visitorID(netip.MustParseAddr("2001:db8:25:86:2::1"), nil, confWithDefaults))
+
+	require.Equal(t, "user:u_123", visitorID(netip.MustParseAddr("1.2.3.4"), userWithTier, confWithDefaults))
+	require.Equal(t, "user:u_123", visitorID(netip.MustParseAddr("2a01:599:b26:2397:dbe7:5aa2:95ce:1e83"), userWithTier, confWithDefaults))
+
+	require.Equal(t, "ip:1.2.0.0", visitorID(netip.MustParseAddr("1.2.3.4"), nil, confWithShortenedPrefixes))
+	require.Equal(t, "ip:2a01:599:b26:2300::", visitorID(netip.MustParseAddr("2a01:599:b26:2397:dbe7:5aa2:95ce:1e83"), nil, confWithShortenedPrefixes))
+}
--- a/server/visitor.go
+++ b/server/visitor.go
@@ -2,13 +2,13 @@ package server

 import (
 	"fmt"
-	"heckel.io/ntfy/v2/log"
-	"heckel.io/ntfy/v2/user"
 	"net/netip"
 	"sync"
 	"time"

 	"golang.org/x/time/rate"
+	"heckel.io/ntfy/v2/log"
+	"heckel.io/ntfy/v2/user"
 	"heckel.io/ntfy/v2/util"
 )

@@ -151,7 +151,7 @@ func (v *visitor) Context() log.Context {
 func (v *visitor) contextNoLock() log.Context {
 	info := v.infoLightNoLock()
 	fields := log.Context{
-		"visitor_id":                     visitorID(v.ip, v.user),
+		"visitor_id":                     visitorID(v.ip, v.user, v.config),
 		"visitor_ip":                     v.ip.String(),
 		"visitor_seen":                   util.FormatTime(v.seen),
 		"visitor_messages":               info.Stats.Messages,
@@ -524,9 +524,15 @@ func dailyLimitToRate(limit int64) rate.Limit {
 	return rate.Limit(limit) * rate.Every(oneDay)
 }

-func visitorID(ip netip.Addr, u *user.User) string {
+// visitorID returns a unique identifier for a visitor based on user or IP, using configurable prefix bits for IPv4/IPv6
+func visitorID(ip netip.Addr, u *user.User, conf *Config) string {
 	if u != nil && u.Tier != nil {
 		return fmt.Sprintf("user:%s", u.ID)
 	}
+	if ip.Is4() {
+		ip = netip.PrefixFrom(ip, conf.VisitorPrefixBitsIPv4).Masked().Addr()
+	} else if ip.Is6() {
+		ip = netip.PrefixFrom(ip, conf.VisitorPrefixBitsIPv6).Masked().Addr()
+	}
 	return fmt.Sprintf("ip:%s", ip.String())
 }