github.com/traefik/traefik/v3 vulnerabilities

Browse known CVEs and advisories by package and ecosystem. Severity tells you the worst case. What determines real risk is whether the vulnerable code actually runs in your applications.

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CVE-IDSeverityPackage summary

CVE-2026-88008Highgithub.com/traefik/traefik/v3: Traefik: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') and Incorrect Authorization CVE-2026-88004Highgithub.com/traefik/traefik/v3: Traefik entrypoint header-name sanitization bypassed via request trailers CVE-2026-88007Criticalgithub.com/traefik/traefik/v3: Traefik HTTP/3 Backend NTLM Connection Reuse CVE-2026-88009Highgithub.com/traefik/traefik/v3: Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and…CVE-2026-88011Mediumgithub.com/traefik/traefik/v2: Traefik: ForwardAuth identity spoofing via dot-form header alias CVE-2026-88012Mediumgithub.com/traefik/traefik/v2: Traefik: respondingTimeouts.readTimeout is not applied to HTTP/3, leaving slow-body uploads unbounded 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 Middleware CVE-2026-67309Highgithub.com/traefik/traefik/v3: Traefik: Kubernetes Ingress NGINX RewriteTarget Path Traversal Allows Route-Level Authentication Bypass CVE-2026-54765Mediumgithub.com/traefik/traefik/v3: Traefik: Gateway HTTPRoute backendRef filters can leak backend context across routes sharing a Service:port CVE-2026-71325Mediumgithub.com/traefik/traefik/v2: Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef CVE-2026-54764Mediumgithub.com/traefik/traefik/v2: Traefik: ForwardAuth middleware leaks X-Forwarded-Port spoofing via untrusted X-Forwarded-Proto when trustForwardHeader=false CVE-2026-71327Highgithub.com/traefik/traefik/v3: Traefik: Gateway API route identity collision allows cross-namespace backend hijacking CVE-2026-71326Lowgithub.com/traefik/traefik/v3: Traefik: BasicAuth singleflight key collision allows authenticated identity spoofing CVE-2026-71324Highgithub.com/traefik/traefik/v2: Traefik: Cross-user response poisoning via proxied CONNECT on Traefik's shared backend keep-alive pool CVE-2026-65602Mediumgithub.com/traefik/traefik/v3: Traefik CRD IngressRouteTCP ServersTransport Cross-Provider Namespace Bypass CVE-2026-54762Mediumgithub.com/traefik/traefik/v3: Traefik Kubernetes Ingress NGINX provider fails open when auth-secret resolution fails CVE-2026-54761Mediumgithub.com/traefik/traefik/v3: Traefik: Kubernetes Gateway crossProviderNamespaces bypass allows HTTPRoute outside the allowlist to expose internal Traefik services CVE-2026-53622Highgithub.com/traefik/traefik/v2: Traefik: HTTP/3 mTLS bypass via exact SNI TLSOptions lookup for wildcard and mixed-case hosts CVE-2026-48491Highgithub.com/traefik/traefik/v2: Traefik: SNICheck ignores wildcard TLSOptions mappings, allowing domain-fronted mTLS bypass CVE-2026-48020Highgithub.com/traefik/traefik/v2: Traefik has a StripPrefix Route-Level Auth Bypass via Path Normalization CVE-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 service CVE-2026-41263Mediumgithub.com/traefik/traefik/v3: Traefik: A timing side-channel vulnerability allows for valid username enumeration via BasicAuth middleware CVE-2026-41174Mediumgithub.com/traefik/traefik/v3: Traefik Kubernetes CRD allows unauthorized cross-namespace middleware binding

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