Github.Com Traefik Traefik V3 vulnerabilities

CVE-2026-67309 [HIGH] CWE-22 Traefik: Kubernetes Ingress NGINX RewriteTarget Path Traversal Allows Route-Level Authentication Bypass 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

CVE-2026-88011 [MEDIUM] CWE-290 Traefik: ForwardAuth identity spoofing via dot-form header alias Traefik: ForwardAuth identity spoofing via dot-form header alias ## Summary There is a medium severity vulnerability in Traefik's handling of request headers whose name aliases another header name. Go canonicalizes header names on dashes only, so `X-Auth-User`, `X_Auth_User` and `X.Auth.User` are three distinct headers to Traefik, while backends that derive variable names from header names (CGI, WS

CVE-2026-65602 [MEDIUM] CWE-863 Traefik CRD IngressRouteTCP ServersTransport Cross-Provider Namespace Bypass Traefik CRD IngressRouteTCP ServersTransport Cross-Provider Namespace Bypass ## Summary There is a medium-severity cross-provider reference vulnerability in Traefik's Kubernetes CRD provider. The `crossProviderNamespaces` allowlist is enforced for HTTP `serversTransport` references but was not enforced for `IngressRouteTCP` service `serversTransport` references. A low-privileged Kuberne

CVE-2026-29054 [HIGH] CWE-178 traefik CVE-2024-45410 fix bypass: lowercase `Connection` tokens can delete traefik-managed forwarded identity headers (for example, `X-Real-Ip`) traefik CVE-2024-45410 fix bypass: lowercase `Connection` tokens can delete traefik-managed forwarded identity headers (for example, `X-Real-Ip`) ## Impact There is a potential vulnerability in Traefik managing the `Connection` header with `X-Forwarded` headers. When Traefik processes HTTP/1.1 requests, the protection p

CVE-2026-88009 [HIGH] CWE-1286 Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging ## Summary Traefik accepts an HTTP/1.x request whose request-target is in rootless / opaque form (for example `GET http:http://internal-vhost/admin HTTP/1.1`). Go parses

CVE-2026-54765 [MEDIUM] CWE-284 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 s

CVE-2024-45410 [CRITICAL] CWE-345 HTTP client can manipulate custom HTTP headers that are added by Traefik HTTP client can manipulate custom HTTP headers that are added by Traefik ### Impact There is a vulnerability in Traefik that allows the client to remove the X-Forwarded headers (except the header X-Forwarded-For). ### Patches - https://github.com/traefik/traefik/releases/tag/v2.11.9 - https://github.com/traefik/traefik/releases/tag/v3.1.3 ### Workarounds No workaround. ### For more i

CVE-2026-71327 [HIGH] CWE-694 Traefik: Gateway API route identity collision allows cross-namespace backend hijacking Traefik: Gateway API route identity collision allows cross-namespace backend hijacking ## Summary There is a high severity vulnerability in Traefik's Kubernetes Gateway API provider. Router and service identities for `HTTPRoute`, `GRPCRoute`, `TCPRoute` and `TLSRoute` objects were built by hyphen-concatenating the route namespace, the route name, the Gateway identity, the entry

CVE-2026-32695 [MEDIUM] CWE-74 Traefik has Knative Ingress Rule Injection that Allows Host Restriction Bypass Traefik has Knative Ingress Rule Injection that Allows Host Restriction Bypass ## Summary There is a potential vulnerability in Traefik's Kubernetes Knative, Ingress, and Ingress-NGINX providers related to rule injection. User-controlled values are interpolated into backtick-delimited Traefik router rule expressions without escaping or validation. A malicious value containing a backti

CVE-2026-27141 [HIGH] CWE-476 Traefik: HTTP/2 frames can cause a running server to panic Traefik: HTTP/2 frames can cause a running server to panic ## Summary More Details: - https://nvd.nist.gov/vuln/detail/CVE-2026-27141 - https://pkg.go.dev/golang.org/x/net/http2?tab=versions ## Patches - https://github.com/traefik/traefik/releases/tag/v3.6.10 - https://github.com/traefik/traefik/releases/tag/v2.11.40 ## For more information If you have any questions or comments about this advisory, ple

CVE-2026-88004 [HIGH] CWE-436 Traefik entrypoint header-name sanitization bypassed via request trailers Traefik entrypoint header-name sanitization bypassed via request trailers ## Summary Traefik's entrypoint defenses against spoofed trusted header names — `aliasHeadersStrategy` / `underscoreHeadersStrategy` in `delete` or `reject` mode, and the default `forwardedHeaders` stripping of client-supplied `X-Forwarded-*` — scan `req.Header` only and never `req.Trailer`. An unauthenticated client c

CVE-2026-25949 [HIGH] CWE-400 Traefik: TCP readTimeout bypass via STARTTLS on Postgres Traefik: TCP readTimeout bypass via STARTTLS on Postgres ## Impact There is a potential vulnerability in Traefik managing STARTTLS requests. An unauthenticated client can bypass Traefik entrypoint `respondingTimeouts.readTimeout` by sending the 8-byte Postgres SSLRequest (STARTTLS) prelude and then stalling, causing connections to remain open indefinitely, leading to a denial of service. ## Patches - http

CVE-2026-26999 [HIGH] CWE-400 Traefik: tcp router clears read deadlines before tls forwarding, enabling stalled handshakes (Slowloris DOS) Traefik: tcp router clears read deadlines before tls forwarding, enabling stalled handshakes (Slowloris DOS) ## Impact There is a potential vulnerability in Traefik managing TLS handshake on TCP routers. When Traefik processes a TLS connection on a TCP router, the read deadline used to bound protocol sniffing is cleared before the TLS handshake is complete

CVE-2024-28869 [HIGH] CWE-404 Traefik vulnerable to denial of service with Content-length header Traefik vulnerable to denial of service with Content-length header There is a potential vulnerability in Traefik managing requests with `Content-length` and no `body` . Sending a `GET` request to any Traefik endpoint with the `Content-length` request header results in an indefinite hang with the default configuration. This vulnerability can be exploited by attackers to induce a denial of service.

CVE-2024-39321 [HIGH] CWE-639 Bypassing IP allow-lists in traefik via HTTP/3 early data requests in QUIC 0-RTT handshakes Bypassing IP allow-lists in traefik via HTTP/3 early data requests in QUIC 0-RTT handshakes ### Impact There is a vulnerability in Traefik that allows bypassing IP allow-lists via HTTP/3 early data requests in QUIC 0-RTT handshakes sent with spoofed IP addresses. ### Patches - https://github.com/traefik/traefik/releases/tag/v2.11.6 - https://github.com/traefik/traefik/rel

CVE-2026-22045 [MEDIUM] CWE-770 Traefik's ACME TLS-ALPN fast path lacks timeouts and close on handshake stall Traefik's ACME TLS-ALPN fast path lacks timeouts and close on handshake stall ## Impact There is a potential vulnerability in Traefik ACME TLS certificates' automatic generation: the ACME TLS-ALPN fast path can allow unauthenticated clients to tie up goroutines and file descriptors indefinitely when the ACME TLS challenge is enabled. A malicious client can open many connections, send

CVE-2026-54761 [MEDIUM] CWE-284 Traefik: Kubernetes Gateway crossProviderNamespaces bypass allows HTTPRoute outside the allowlist to expose internal Traefik services Traefik: Kubernetes Gateway crossProviderNamespaces bypass allows HTTPRoute outside the allowlist to expose internal Traefik services ## Summary There is a high severity vulnerability in Traefik's Kubernetes Gateway provider affecting the `crossProviderNamespaces` allowlist. For `HTTPRoute` rules that declare multiple (WRR) backen

CVE-2023-47633 [HIGH] CWE-400 Traefik docker container using 100% CPU Traefik docker container using 100% CPU ### Summary The traefik docker container uses 100% CPU when it serves as its own backend, which is an automatically generated route resulting from the Docker integration in the default configuration. ### Details While attempting to set up Traefik to handle traffic for Docker containers, I observed in the webUI a rule with the following information: `Host(traefik-service) | webwebsec

CVE-2025-66490 [MEDIUM] CWE-436 Path Normalization Bypass in Traefik Router + Middleware Rules Path Normalization Bypass in Traefik Router + Middleware Rules ## Impact There is a potential vulnerability in Traefik managing the requests using a `PathPrefix`, `Path` or `PathRegex` matcher. When Traefik is configured to route the requests to a backend using a matcher based on the path; if the request path contains an encoded restricted character from the following set **('/', '\', 'Null', ';', '

CVE-2026-29777 [MEDIUM] CWE-74 Traefik: kubernetes gateway rule injection via unescaped backticks in HTTPRoute match values Traefik: kubernetes gateway rule injection via unescaped backticks in HTTPRoute match values ## Summary There is a potential vulnerability in Traefik's Kubernetes Gateway provider related to rule injection. A tenant with write access to an HTTPRoute resource can inject backtick-delimited rule tokens into Traefik's router rule language via unsanitized header or query para