CVE-2025-66490 Traefik doesn't Prevent Path Normalization Bypass in Router + Middleware Rules

Traefik is an HTTP reverse proxy and load balancer. For versions prior to 2.11.32 and 2.11.31 through 3.6.2, requests using PathPrefix, Path or PathRegex matchers can bypass path normalization. When Traefik uses path-based routing, requests containing URL-encoded restricted characters /, , Null,...

CVE-2025-66490

Traefik is an HTTP reverse proxy and load balancer. For versions prior to 2.11.32 and 2.11.31 through 3.6.2, requests using PathPrefix, Path or PathRegex matchers can bypass path normalization. When Traefik uses path-based routing, requests containing URL-encoded restricted characters /, , Null,...

EUVD-2025-201731

Traefik is an HTTP reverse proxy and load balancer. For versions prior to 2.11.32 and 2.11.31 through 3.6.2, requests using PathPrefix, Path or PathRegex matchers can bypass path normalization. When Traefik uses path-based routing, requests containing URL-encoded restricted characters /, , Null,...

CVE-2025-66490

CVE-2025-66490 affects Traefik, where versions prior to 2.11.32 and 2.11.31–3.6.2 could bypass path normalization when using PathPrefix, Path, or PathRegex matchers. Under path-based routing, requests containing URL-encoded restricted characters (/, , Null, ;, ?, #) may bypass the middleware chai...

CVE-2025-66490 Traefik doesn't Prevent Path Normalization Bypass in Router + Middleware Rules

Traefik is an HTTP reverse proxy and load balancer. For versions prior to 2.11.32 and 2.11.31 through 3.6.2, requests using PathPrefix, Path or PathRegex matchers can bypass path normalization. When Traefik uses path-based routing, requests containing URL-encoded restricted characters /, , Null,...

Traefik 安全漏洞

Traefik is an open source reverse proxy and load balancing tool from Traefik Open Source. A security vulnerability exists in Traefik versions 3.5.0 through 3.6.2, which stems from a reversal of TLS authentication logic and could lead to a man-in-the-middle attack...

Traefik 安全漏洞

Traefik is an open source reverse proxy and load balancing tool from Traefik Open Source. A security vulnerability exists in Traefik versions 2.11.31 through 3.6.2, which stems from a path normalization bypass that could result in requests bypassing security controls...

PT-2025-49684

Name of the Vulnerable Software and Affected Versions Traefik versions prior to 2.11.32 and 2.11.31 through 3.6.2 Description Traefik is an HTTP reverse proxy and load balancer. Requests using PathPrefix, Path, or PathRegex matchers can bypass path normalization. When Traefik uses path-based...

GHSA-7VWW-MVCR-X6VJ Traefik Inverted TLS Verification Logic in ingress-nginx Provider

Impact There is a potential vulnerability in Traefik NGINX provider managing the nginx.ingress.kubernetes.io/proxy-ssl-verify annotation. The provider inverts the semantics of the nginx.ingress.kubernetes.io/proxy-ssl-verify annotation. Setting the annotation to "on" intending to enable backend T...

Improper Certificate Validation

Overview Affected versions of this package are vulnerable to Improper Certificate Validation due to inverted logic in the InsecureSkipVerify field when processing the nginx.ingress.kubernetes.io/proxy-ssl-verify annotation. An attacker can intercept and read sensitive data by performing...

Traefik Inverted TLS Verification Logic in ingress-nginx Provider

Impact There is a potential vulnerability in Traefik NGINX provider managing the nginx.ingress.kubernetes.io/proxy-ssl-verify annotation. The provider inverts the semantics of the nginx.ingress.kubernetes.io/proxy-ssl-verify annotation. Setting the annotation to "on" intending to enable backend T...

Interpretation Conflict

Overview Affected versions of this package are vulnerable to Interpretation Conflict in path matching. An attacker can gain unauthorized access to restricted endpoints by sending requests with URL-encoded restricted characters in the path, which bypasses middleware and security controls...

Interpretation Conflict

Overview Affected versions of this package are vulnerable to Interpretation Conflict in path matching. An attacker can gain unauthorized access to restricted endpoints by sending requests with URL-encoded restricted characters in the path, which bypasses middleware and security controls...

Interpretation Conflict

Overview github.com/traefik/traefik/v2/pkg/server is a server package for traefik, a cloud native edge router. Affected versions of this package are vulnerable to Interpretation Conflict in path matching. An attacker can gain unauthorized access to restricted endpoints by sending requests with...

Interpretation Conflict

Overview Affected versions of this package are vulnerable to Interpretation Conflict in path matching. An attacker can gain unauthorized access to restricted endpoints by sending requests with URL-encoded restricted characters in the path, which bypasses middleware and security controls...

Interpretation Conflict

Overview Affected versions of this package are vulnerable to Interpretation Conflict in path matching. An attacker can gain unauthorized access to restricted endpoints by sending requests with URL-encoded restricted characters in the path, which bypasses middleware and security controls...

Interpretation Conflict

Overview Affected versions of this package are vulnerable to Interpretation Conflict in path matching. An attacker can gain unauthorized access to restricted endpoints by sending requests with URL-encoded restricted characters in the path, which bypasses middleware and security controls...

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 followin...

GHSA-GM3X-23WP-HC2C 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 followin...

traefik -- Inverted TLS Verification Logic in Kubernetes NGINX Provider

The traefik project reports: There is a potential vulnerability in Traefik NGINX provider managing the nginx.ingress.kubernetes.io/proxy-ssl-verify annotation. The provider inverts the semantics of the nginx.ingress.kubernetes.io/proxy-ssl-verify annotation. Setting the annotation to "on" intendi...