CVE-2026-71327

Traefik is an open source HTTP reverse proxy and load balancer. From 3.0.0 until 3.6.25 and 3.7.10, Traefik's Kubernetes Gateway API provider in pkg/provider/kubernetes/gateway/httproute.go, grpcroute.go, tcproute.go, and tlsroute.go builds HTTPRoute, GRPCRoute, TCPRoute, and TLSRoute router and...

CVE-2026-71324

Traefik is an open source HTTP reverse proxy and load balancer. Prior to 2.11.53, 3.6.24, and 3.7.9, Traefik's default HTTP reverse proxy forwards a plain HTTP/2 or HTTP/3 CONNECT request and its body to an HTTP/1.1 upstream through a shared net/http.Transport. When the upstream answers the CONNE...

CVE-2026-71326

Traefik is an open source HTTP reverse proxy and load balancer. From 3.6.11 until 3.6.25 and 3.7.10, Traefik's BasicAuth middleware in pkg/middlewares/auth/basicauth.go deduplicates concurrent password checks with a singleflight key built from the delimiter-free concatenation of password and...

CVE-2026-71325

Traefik is an open-source edge router that makes publishing services a fun and easy experience. Prior to 2.11.54, 3.6.25, and 3.7.10, cross-namespace @kubernetescrd references are not rejected for TraefikService backend references resolved by the service resolver. A tenant confined by RBAC to a...

CVE-2026-71326

creationtimestamp| type| source ---|---|--- 2026-08-06 18:35:20+00:00| published-proof-of-concept| https://github.com/traefik/traefik/security/advisories/GHSA-6765-c87h-8mrf...

CVE-2026-71327

creationtimestamp| type| source ---|---|--- 2026-08-06 18:35:18+00:00| published-proof-of-concept| https://github.com/traefik/traefik/security/advisories/GHSA-fgjj-px3w-67xx...

CVE-2026-71325

creationtimestamp| type| source ---|---|--- 2026-08-06 18:35:13+00:00| published-proof-of-concept| https://github.com/traefik/traefik/security/advisories/GHSA-62fc-8686-hfmq...

GHSA-X677-9FXG-V5C5 Traefik: Incomplete fix for CVE-2026-33433 + CVE-2026-39858 cross-cohort: headerField underscore-variant identity spoofing in BasicAuth / DigestAuth / ForwardAuth

Summary There is a high severity vulnerability in Traefik's BasicAuth, DigestAuth, and ForwardAuth middlewares. The fix for CVE-2026-33433 stripped canonical-cased spoofed identity headers e.g. X-Auth-User before writing Traefik's own value, but did not account for underscore-variant header names...

EUVD-2026-41940

Traefik: Incomplete fix for CVE-2026-33433 + CVE-2026-39858 cross-cohort: headerField underscore-variant identity spoofing in BasicAuth / DigestAuth / ForwardAuth...

Traefik: Incomplete fix for CVE-2026-33433 + CVE-2026-39858 cross-cohort: headerField underscore-variant identity spoofing in BasicAuth / DigestAuth / ForwardAuth

Summary There is a high severity vulnerability in Traefik's BasicAuth, DigestAuth, and ForwardAuth middlewares. The fix for CVE-2026-33433 stripped canonical-cased spoofed identity headers e.g. X-Auth-User before writing Traefik's own value, but did not account for underscore-variant header names...

EUVD-2026-47644

Traefik: Authentication Bypass via Path Traversal in ReplacePathRegex Middleware...

GHSA-CXJQ-MRR5-89RV Traefik: Authentication Bypass via Path Traversal in ReplacePathRegex Middleware

Summary There is a critical authentication-bypass vulnerability in Traefik's ReplacePathRegex middleware. When it is configured with a regular expression that captures user-controlled path segments without a mandatory separator for example regex: "^/api.", replacement: "/$1", a crafted request ca...

Traefik: Authentication Bypass via Path Traversal in ReplacePathRegex Middleware

Summary There is a critical authentication-bypass vulnerability in Traefik's ReplacePathRegex middleware. When it is configured with a regular expression that captures user-controlled path segments without a mandatory separator for example regex: "^/api.", replacement: "/$1", a crafted request ca...

Traefik: Kubernetes Ingress NGINX RewriteTarget Path Traversal Allows Route-Level Authentication Bypass

Summary There is a high severity vulnerability in Traefik's Kubernetes Ingress NGINX provider. When an Ingress uses the nginx.ingress.kubernetes.io/rewrite-target annotation with a regular expression that captures attacker-controlled text without requiring a path separator for example path /api...

EUVD-2026-51815

Traefik: Kubernetes Ingress NGINX RewriteTarget Path Traversal Allows Route-Level Authentication Bypass...

GHSA-8RXV-JG7P-WVG3 Traefik: Kubernetes Ingress NGINX RewriteTarget Path Traversal Allows Route-Level Authentication Bypass

Summary There is a high severity vulnerability in Traefik's Kubernetes Ingress NGINX provider. When an Ingress uses the nginx.ingress.kubernetes.io/rewrite-target annotation with a regular expression that captures attacker-controlled text without requiring a path separator for example path /api...

EUVD-2026-41938

Traefik: Gateway HTTPRoute backendRef filters can leak backend context across routes sharing a Service:port...

Traefik: Gateway HTTPRoute backendRef filters can leak backend context across routes sharing a Service:port

Summary There is a medium severity vulnerability in Traefik's Kubernetes Gateway API provider. When two accepted HTTPRoutes target the same backend Service:port but configure different backendRef filters, Traefik may resolve both routes to the same child service and apply only one route's filter...

GHSA-6P8F-P8J2-RQMV Traefik: Gateway HTTPRoute backendRef filters can leak backend context across routes sharing a Service:port

Summary There is a medium severity vulnerability in Traefik's Kubernetes Gateway API provider. When two accepted HTTPRoutes target the same backend Service:port but configure different backendRef filters, Traefik may resolve both routes to the same child service and apply only one route's filter...

Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef

Summary There is a medium severity vulnerability in Traefik's Kubernetes CRD provider. When providers.kubernetesCRD.allowCrossNamespace is disabled — the default — cross-namespace @kubernetescrd references are rejected for middlewares, TLS options and HTTP/TCP ServersTransports, but the same...