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

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...

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...

CVE-2025-66490: Interpretation Conflict

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,...

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...