github.com/traefik/traefik/v3 vulnerabilities

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CVE-IDSeverityPackage summary
CVE-2026-54763Highgithub.com/traefik/traefik/v2: Traefik: Incomplete fix for CVE-2026-33433 + CVE-2026-39858 cross-cohort: headerField underscore-variant identity spoofing in BasicAuth /…CVE-2026-65600Criticalgithub.com/traefik/traefik/v2: Traefik: Authentication Bypass via Path Traversal in ReplacePathRegex MiddlewareCVE-2026-67309Highgithub.com/traefik/traefik/v3: Traefik: Kubernetes Ingress NGINX RewriteTarget Path Traversal Allows Route-Level Authentication BypassCVE-2026-54765Mediumgithub.com/traefik/traefik/v3: Traefik: Gateway HTTPRoute backendRef filters can leak backend context across routes sharing a Service:portCVE-2026-71325Mediumgithub.com/traefik/traefik/v2: Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRefCVE-2026-54764Mediumgithub.com/traefik/traefik/v2: Traefik: ForwardAuth middleware leaks X-Forwarded-Port spoofing via untrusted X-Forwarded-Proto when trustForwardHeader=falseCVE-2026-71327Highgithub.com/traefik/traefik/v3: Traefik: Gateway API route identity collision allows cross-namespace backend hijackingCVE-2026-71326Lowgithub.com/traefik/traefik/v3: Traefik: BasicAuth singleflight key collision allows authenticated identity spoofingCVE-2026-71324Highgithub.com/traefik/traefik/v2: Traefik: Cross-user response poisoning via proxied CONNECT on Traefik's shared backend keep-alive poolCVE-2026-65602Mediumgithub.com/traefik/traefik/v3: Traefik CRD IngressRouteTCP ServersTransport Cross-Provider Namespace BypassCVE-2026-54762Mediumgithub.com/traefik/traefik/v3: Traefik Kubernetes Ingress NGINX provider fails open when auth-secret resolution failsCVE-2026-54761Mediumgithub.com/traefik/traefik/v3: Traefik: Kubernetes Gateway crossProviderNamespaces bypass allows HTTPRoute outside the allowlist to expose internal Traefik servicesCVE-2026-48020Highgithub.com/traefik/traefik/v2: Traefik has a StripPrefix Route-Level Auth Bypass via Path NormalizationCVE-2026-44774Mediumgithub.com/traefik/traefik/v3: Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite…CVE-2026-41181Mediumgithub.com/traefik/traefik/v2: Traefik's errors middleware forwards Authorization and Cookie headers to separate error page serviceCVE-2026-41263Mediumgithub.com/traefik/traefik/v3: Traefik: A timing side-channel vulnerability allows for valid username enumeration via BasicAuth middlewareCVE-2026-41174Mediumgithub.com/traefik/traefik/v3: Traefik Kubernetes CRD allows unauthorized cross-namespace middleware bindingCVE-2026-40912Highgithub.com/traefik/traefik/v3: Traefik has an StripPrefixRegex Middleware Authorization Bypass via Path/RawPath DesyncCVE-2026-39858Highgithub.com/traefik/traefik/v3: Traefik: Pre-authentication decision bypass due to forwarded alias spoofingCVE-2026-35051Highgithub.com/traefik/traefik/v3: Traefik's ForwardAuth trustForwardHeader=false allows spoofed X-Forwarded-Prefix to bypass authenticationGHSA-46WH-3698-F2CXHighgithub.com/traefik/traefik/v2: Traefik: Deny Rule Bypass via Unauthenticated Malicious gRPC Requests in gRPC-Go Dependency (CVE-2026-33186)CVE-2026-33433Mediumgithub.com/traefik/traefik/v2: Traefik Vulnerable to BasicAuth/DigestAuth Identity Spoofing via Non-Canonical headerFieldCVE-2026-32695Mediumgithub.com/traefik/traefik/v3: Traefik has Knative Ingress Rule Injection that Allows Host Restriction BypassCVE-2026-32595Mediumgithub.com/traefik/traefik: Traefik Affected by BasicAuth Middleware Timing Attack Allows Username EnumerationCVE-2026-32305Highgithub.com/traefik/traefik/v3: Traefik has a Potential mTLS Bypass via Fragmented TLS ClientHello Causing Pre-SNI Sniff Fallback to Default Non-mTLS TLS Config

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