CVE-2026-65600

Traefik versions = v3.6.0 = v3.7.0 = v3.7.6 contain an authentication bypass via path traversal in the ReplacePathRegex middleware. When ReplacePathRegex is configured with a regex that captures user-controlled path segments without a mandatory path separator e.g. regex "^/api.", replacement "/$1...

CVE-2026-65600 Traefik before v2.11.52 Authentication Bypass via ReplacePathRegex

Traefik versions = v3.6.0 = v3.7.0 = v3.7.6 contain an authentication bypass via path traversal in the ReplacePathRegex middleware. When ReplacePathRegex is configured with a regex that captures user-controlled path segments without a mandatory path separator e.g. regex "^/api.", replacement "/$1...

EUVD-2026-47644

Traefik versions = v3.6.0 = v3.7.0 = v3.7.6 contain an authentication bypass via path traversal in the ReplacePathRegex middleware. When ReplacePathRegex is configured with a regex that captures user-controlled path segments without a mandatory path separator e.g. regex "^/api.", replacement "/$1...

CVE-2026-65600

Traefik contains an authentication bypass in the ReplacePathRegex middleware for certain versions. Vulnerable were Traefik builds with ReplacePathRegex configured to capture user-controlled path segments without a mandatory path separator, allowing un-normalized paths (e.g., /api../admin) to bypa...