Github.Com Traefik Traefik V2 vulnerabilities

CVE-2023-45288 [HIGH] Traefik affected by HTTP/2 CONTINUATION flood in net/http Traefik affected by HTTP/2 CONTINUATION flood in net/http There is a potential vulnerability in Traefik managing HTTP/2 connections. More details in the [CVE-2023-45288](https://www.cve.org/CVERecord?id=CVE-2023-45288). ## Patches - https://github.com/traefik/traefik/releases/tag/v2.11.2 - https://github.com/traefik/traefik/releases/tag/v3.0.0-rc5 ## Workarounds No workaround ## For more information If you ha

CVE-2026-48020 [HIGH] CWE-288 Traefik has a StripPrefix Route-Level Auth Bypass via Path Normalization Traefik has a StripPrefix Route-Level Auth Bypass via Path Normalization ## Summary There is a high severity vulnerability in Traefik's `StripPrefix` middleware that allows an unauthenticated attacker to bypass route-level authentication and authorization. When a public router matches on a `PathPrefix` rule and applies the `StripPrefix` middleware, a request path containing `..` or its percen

CVE-2026-39858 [HIGH] CWE-290 Traefik: Pre-authentication decision bypass due to forwarded alias spoofing Traefik: Pre-authentication decision bypass due to forwarded alias spoofing ## Summary There is a high severity authentication bypass vulnerability in Traefik's `ForwardAuth` and snippet-based authentication middleware. Traefik's forwarded-header sanitization logic targets only canonical header names (e.g., `X-Forwarded-Proto`) and does not strip or normalize alias variants that use unders

CVE-2026-53622 [HIGH] CWE-288 Traefik: HTTP/3 mTLS bypass via exact SNI TLSOptions lookup for wildcard and mixed-case hosts Traefik: HTTP/3 mTLS bypass via exact SNI TLSOptions lookup for wildcard and mixed-case hosts ## Summary There is a critical vulnerability in Traefik's HTTP/3 (QUIC) TLS configuration selection that allows unauthenticated clients to bypass router-specific mTLS enforcement. When HTTP/3 is enabled on an entrypoint, the TLS handshake selects the applicable TLS configuration

CVE-2026-33186 [CRITICAL] CWE-1395 Traefik: Deny Rule Bypass via Unauthenticated Malicious gRPC Requests in gRPC-Go Dependency (CVE-2026-33186) Traefik: Deny Rule Bypass via Unauthenticated Malicious gRPC Requests in gRPC-Go Dependency (CVE-2026-33186) ## Summary There is a potential vulnerability in Traefik due to its dependency on an affected version of gRPC-Go (CVE-2026-33186). A remote, unauthenticated attacker can send gRPC requests with a malformed HTTP/2 `:path` pseudo-header omitting

CVE-2026-35051 [HIGH] CWE-345 Traefik's ForwardAuth trustForwardHeader=false allows spoofed X-Forwarded-Prefix to bypass authentication Traefik's ForwardAuth trustForwardHeader=false allows spoofed X-Forwarded-Prefix to bypass authentication ## Summary There is a high-severity authentication bypass vulnerability in Traefik's `ForwardAuth` middleware when `trustForwardHeader=false` is configured and Traefik is deployed behind a trusted upstream proxy. While `X-Forwarded-*` headers (such as `X-

CVE-2026-44774 [MEDIUM] CWE-284 Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false ## Summary There is a medium severity vulnerability in Traefik's Kubernetes Gateway API provider that allows a tenant with `HTTPRoute` creation permissi

CVE-2025-47952 [HIGH] CWE-22 Traefik allows path traversal using url encoding Traefik allows path traversal using url encoding ## 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 URL contains a URL encoded string in its path, it’s possible to target a backend, exposed using another router, by-passing the middlewa

CVE-2025-68121 [CRITICAL] CWE-1395 Traefik affected by TLS ClientAuth Bypass on HTTP/3 Traefik affected by TLS ClientAuth Bypass on HTTP/3 ### Summary There is a potential vulnerability in Traefik managing HTTP/3 connections. More details in the [CVE-2025-68121](https://nvd.nist.gov/vuln/detail/CVE-2025-68121). ## Patches - https://github.com/traefik/traefik/releases/tag/v2.11.37 - https://github.com/traefik/traefik/releases/tag/v3.6.8 ## Workarounds No workaround ## For more information

CVE-2025-54386 [HIGH] CWE-22 Traefik Client Plugin's Path Traversal Vulnerability Allows Arbitrary File Overwrite and Remote Code Execution Traefik Client Plugin's Path Traversal Vulnerability Allows Arbitrary File Overwrite and Remote Code Execution ### Summary A path traversal vulnerability was discovered in WASM Traefik’s plugin installation mechanism. By supplying a maliciously crafted ZIP archive containing file paths with `../` sequences, an attacker can overwrite arbitrary files on the s

CVE-2026-33433 [MEDIUM] CWE-290 Traefik Vulnerable to BasicAuth/DigestAuth Identity Spoofing via Non-Canonical headerField Traefik Vulnerable to BasicAuth/DigestAuth Identity Spoofing via Non-Canonical headerField ## Summary There is a potential vulnerability in Traefik's Basic and Digest authentication middlewares when `headerField` is configured with a non-canonical HTTP header name. An authenticated attacker with valid credentials can inject the canonical version of the configured header t

CVE-2025-32431 [HIGH] CWE-22 Traefik has a possible vulnerability with its path matchers Traefik has a possible vulnerability with its path matchers ## 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 URL contains a `/../` in its path, it’s possible to target a backend, exposed using another router, by-passing th

CVE-2026-40912 [HIGH] CWE-706 Traefik has an StripPrefixRegex Middleware Authorization Bypass via Path/RawPath Desync Traefik has an StripPrefixRegex Middleware Authorization Bypass via Path/RawPath Desync ## Summary There is a high severity authentication bypass vulnerability in Traefik's `StripPrefixRegex` middleware when used in combination with `ForwardAuth`, `BasicAuth`, or `DigestAuth`. The middleware matches the regex against the decoded URL path but uses the resulting byte length to s

CVE-2020-15129 [MEDIUM] CWE-601 Traefik vulnerable to Open Redirect via handling of X-Forwarded-Prefix header Traefik vulnerable to Open Redirect via handling of X-Forwarded-Prefix header ## Summary There exists a potential open redirect vulnerability in Traefik's handling of the `X-Forwarded-Prefix` header. Active Exploitation of this issue is unlikely as it would require active header injection, however the Traefik team addressed this issue nonetheless to prevent abuse in e.g. cache poisonin

CVE-2025-22871 [CRITICAL] CWE-1395 Traefik affected by Go HTTP Request Smuggling Vulnerability Traefik affected by Go HTTP Request Smuggling Vulnerability ### Summary net/http: request smuggling through invalid chunked data: The net/http package accepts data in the chunked transfer encoding containing an invalid chunk-size line terminated by a bare LF. When used in conjunction with a server or proxy which incorrectly interprets a bare LF in a chunk extension as part of the extension, this could

CVE-2024-24790 [CRITICAL] CWE-180 Traefik has unexpected behavior with IPv4-mapped IPv6 addresses Traefik has unexpected behavior with IPv4-mapped IPv6 addresses ### Impact There is a vulnerability in [Go managing various Is methods (IsPrivate, IsLoopback, etc) for IPv4-mapped IPv6 addresses](https://groups.google.com/g/golang-announce/c/XbxouI9gY7k/m/TuoGEhxIEwAJ). They didn't work as expected returning false for addresses which would return true in their traditional IPv4 forms. ### Referen

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-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-2026-32695 [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