per-target rate limit

go.mod

@@ -99,7 +99,7 @@ require (
 	github.com/projectdiscovery/mapcidr v1.1.34
 	github.com/projectdiscovery/n3iwf v0.0.0-20230523120440-b8cd232ff1f5
 	github.com/projectdiscovery/networkpolicy v0.1.18
-	github.com/projectdiscovery/ratelimit v0.0.81
+	github.com/projectdiscovery/ratelimit v0.0.82-0.20250819165347-d56e782c656d
 	github.com/projectdiscovery/rdap v0.9.0
 	github.com/projectdiscovery/sarif v0.0.1
 	github.com/projectdiscovery/tlsx v1.1.9

go.sum

@@ -805,6 +805,12 @@ github.com/projectdiscovery/networkpolicy v0.1.18 h1:DAeP73SvcuT4evaohNS7BPELw+V
 github.com/projectdiscovery/networkpolicy v0.1.18/go.mod h1:2yWanKsU2oBZ75ch94IsEQy6hByFp+3oTiSyC6ew3TE=
 github.com/projectdiscovery/ratelimit v0.0.81 h1:u6lW+rAhS/UO0amHTYmYLipPK8NEotA9521hdojBtgI=
 github.com/projectdiscovery/ratelimit v0.0.81/go.mod h1:tK04WXHuC4i6AsFkByInODSNf45gd9sfaMHzmy2bAsA=
+github.com/projectdiscovery/ratelimit v0.0.82-0.20250819014026-b6ac32486d12 h1:oS/0Oe6tv7SG2zoFBofwvoB3mfDb5Yk76np4zU0Mcg8=
+github.com/projectdiscovery/ratelimit v0.0.82-0.20250819014026-b6ac32486d12/go.mod h1:z076BrLkBb5yS7uhHNoCTf8X/BvFSGRxwQ8EzEL9afM=
+github.com/projectdiscovery/ratelimit v0.0.82-0.20250819164203-5e0837ee74a5 h1:tulP7aVzZsWlXbWo6W78nVFqJ05c6zSS8dsos/cBaSY=
+github.com/projectdiscovery/ratelimit v0.0.82-0.20250819164203-5e0837ee74a5/go.mod h1:z076BrLkBb5yS7uhHNoCTf8X/BvFSGRxwQ8EzEL9afM=
+github.com/projectdiscovery/ratelimit v0.0.82-0.20250819165347-d56e782c656d h1:zUptoE5gh4gyJsbcHfNUEKgdoieyAHW2hCfWXZ/Zye4=
+github.com/projectdiscovery/ratelimit v0.0.82-0.20250819165347-d56e782c656d/go.mod h1:z076BrLkBb5yS7uhHNoCTf8X/BvFSGRxwQ8EzEL9afM=
 github.com/projectdiscovery/rawhttp v0.1.90 h1:LOSZ6PUH08tnKmWsIwvwv1Z/4zkiYKYOSZ6n+8RFKtw=
 github.com/projectdiscovery/rawhttp v0.1.90/go.mod h1:VZYAM25UI/wVB3URZ95ZaftgOnsbphxyAw/XnQRRz4Y=
 github.com/projectdiscovery/rdap v0.9.0 h1:wPhHx5pQ2QI+WGhyNb2PjhTl0NtB39Nk7YFZ9cp8ZGA=

internal/runner/runner.go

@@ -87,7 +87,7 @@ type Runner struct {
 	colorizer          aurora.Aurora
 	issuesClient       reporting.Client
 	browser            *engine.Browser
-	rateLimiter        *ratelimit.Limiter
+	rateLimiter        *ratelimit.AutoLimiter
 	hostErrors         hosterrorscache.CacheInterface
 	resumeCfg          *types.ResumeCfg
 	pprofServer        *pprofutil.PprofServer
@@ -384,11 +384,17 @@ func New(options *types.Options) (*Runner, error) {
 	if options.RateLimit > 0 && options.RateLimitDuration == 0 {
 		options.RateLimitDuration = time.Second
 	}
+	var ratelimiter *ratelimit.AutoLimiter
 	if options.RateLimit == 0 && options.RateLimitDuration == 0 {
-		runner.rateLimiter = ratelimit.NewUnlimited(context.Background())
+		ratelimiter = ratelimit.NewAutoLimiter(context.Background(), ratelimit.WithUnlimited())
 	} else {
-		runner.rateLimiter = ratelimit.New(context.Background(), uint(options.RateLimit), options.RateLimitDuration)
+		ratelimiter = ratelimit.NewAutoLimiter(
+			context.Background(),
+			ratelimit.WithMaxCount(uint(options.RateLimit)),
+			ratelimit.WithDuration(options.RateLimitDuration),
+		)
 	}
+	runner.rateLimiter = ratelimiter
 
 	if tmpDir, err := os.MkdirTemp("", "nuclei-tmp-*"); err == nil {
 		runner.tmpDir = tmpDir

internal/server/nuclei_sdk.go

@@ -50,7 +50,7 @@ type NucleiExecutorOptions struct {
 	Progress           progress.Progress
 	Catalog            catalog.Catalog
 	IssuesClient       reporting.Client
-	RateLimiter        *ratelimit.Limiter
+	RateLimiter        *ratelimit.AutoLimiter
 	Interactsh         *interactsh.Client
 	ProjectFile        *projectfile.ProjectFile
 	Browser            *browserEngine.Browser

pkg/protocols/dns/request.go

@@ -151,7 +151,7 @@ func (request *Request) execute(input *contextargs.Context, domain string, metad
 		}
 	}
 
-	request.options.RateLimitTake()
+	request.options.RateLimitTake(input)
 
 	// Send the request to the target servers
 	response, err := dnsClient.Do(compiledRequest)

pkg/protocols/http/request.go

@@ -291,7 +291,7 @@ func (request *Request) executeParallelHTTP(input *contextargs.Context, dynamicV
 				return
 			}
 			// putting ratelimiter here prevents any unnecessary waiting if any
-			request.options.RateLimitTake()
+			request.options.RateLimitTake(input)
 
 			// after ratelimit take, check if we need to stop
 			if spmHandler.FoundFirstMatch() || request.isUnresponsiveAddress(updatedInput) || spmHandler.Cancelled() {
@@ -470,7 +470,7 @@ func (request *Request) ExecuteWithResults(input *contextargs.Context, dynamicVa
 		executeFunc := func(data string, payloads, dynamicValue map[string]interface{}) (bool, error) {
 			hasInteractMatchers := interactsh.HasMatchers(request.CompiledOperators)
 
-			request.options.RateLimitTake()
+			request.options.RateLimitTake(input)
 
 			ctx := request.newContext(input)
 			ctxWithTimeout, cancel := context.WithTimeoutCause(ctx, request.options.Options.GetTimeouts().HttpTimeout, ErrHttpEngineRequestDeadline)

pkg/protocols/http/request_fuzz.go

@@ -181,7 +181,7 @@ func (request *Request) executeGeneratedFuzzingRequest(gr fuzz.GeneratedRequest,
 	if request.options.HostErrorsCache != nil && request.options.HostErrorsCache.Check(request.options.ProtocolType.String(), input) {
 		return false
 	}
-	request.options.RateLimitTake()
+	request.options.RateLimitTake(input)
 	req := &generatedRequest{
 		request:              gr.Request,
 		dynamicValues:        gr.DynamicValues,

pkg/protocols/protocols.go

@@ -78,7 +78,7 @@ type ExecutorOptions struct {
 	// Progress is a progress client for scan reporting
 	Progress progress.Progress
 	// RateLimiter is a rate-limiter for limiting sent number of requests.
-	RateLimiter *ratelimit.Limiter
+	RateLimiter *ratelimit.AutoLimiter
 	// Catalog is a template catalog implementation for nuclei
 	Catalog catalog.Catalog
 	// ProjectFile is the project file for nuclei
@@ -143,7 +143,7 @@ type ExecutorOptions struct {
 // todo: centralizing components is not feasible with current clogged architecture
 // a possible approach could be an internal event bus with pub-subs? This would be less invasive than
 // reworking dep injection from scratch
-func (e *ExecutorOptions) RateLimitTake() {
+func (e *ExecutorOptions) RateLimitTake(ctx *contextargs.Context) {
 	// The code below can race and there isn't a great way to fix this without adding an idempotent
 	// function to the rate limiter implementation. For now, stick with whatever rate is already set.
 	/*
@@ -152,8 +152,11 @@ func (e *ExecutorOptions) RateLimitTake() {
 			e.RateLimiter.SetDuration(e.Options.RateLimitDuration)
 		}
 	*/
+	if hostErrorCache, ok := e.HostErrorsCache.(*hosterrorscache.Cache); ok {
+		key := hostErrorCache.GetKeyFromContext(ctx, nil)
 		if e.RateLimiter != nil {
-		e.RateLimiter.Take()
+			e.RateLimiter.Take(key)
+		}
 	}
 }
 

pkg/testutils/testutils.go

@@ -88,6 +88,11 @@ type TemplateInfo struct {
 // NewMockExecuterOptions creates a new mock executeroptions struct
 func NewMockExecuterOptions(options *types.Options, info *TemplateInfo) *protocols.ExecutorOptions {
 	progressImpl, _ := progress.NewStatsTicker(0, false, false, false, 0)
+	rateLimiter := ratelimit.NewAutoLimiter(
+		context.Background(),
+		ratelimit.WithMaxCount(uint(options.RateLimit)),
+		ratelimit.WithDuration(time.Second),
+	)
 	executerOpts := &protocols.ExecutorOptions{
 		TemplateID:   info.ID,
 		TemplateInfo: info.Info,
@@ -99,7 +104,7 @@ func NewMockExecuterOptions(options *types.Options, info *TemplateInfo) *protoco
 		IssuesClient: nil,
 		Browser:      nil,
 		Catalog:      disk.NewCatalog(config.DefaultConfig.TemplatesDirectory),
-		RateLimiter:  ratelimit.New(context.Background(), uint(options.RateLimit), time.Second),
+		RateLimiter:  rateLimiter,
 	}
 	executerOpts.CreateTemplateCtxStore()
 	return executerOpts