traefik-stripprefix-auth-bypass-cve-2026-48020-path-normalization

CVE-2026-48020 — Traefik StripPrefix 路由级认证绕过（PoC） 一个独立的对于 CVE-2026-48020 的概念验证，该漏洞是 Traefik 的 StripPrefix 中间件中的路由级认证/授权绕过，由于路由决策做出 之后 才进行路径规范化。 形如 GET /api../admin 的请求在路由时通过一个 公开的 PathPrefix/api路由器（因此受保护路由器的basicAuth中间件从未附加），但在StripPrefix剥离/api且 Go 的req.URL.JoinPath规范化剩余的/../admin后，后端收到的路径是/admin...

CVE-2026-48020

A flaw was found in Traefik, an HTTP reverse proxy and load balancer. This vulnerability exists in the StripPrefix middleware, allowing an unauthenticated attacker to bypass route-level authentication and authorization. By crafting a request path containing '..' or its percent-encoded form, an...

CVE-2026-48020

Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.48, 3.6.19, and 3.7.3, 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...

CVE-2026-48020

Traefik CVE-2026-48020 describes an authentication bypass via StripPrefix Route-Level Auth Bypass. Prior to fixes, when a public router uses PathPrefix with StripPrefix, requests containing .. or %2e%2e could match the public route, then after prefix stripping and path normalization, resolve to a...

CVE-2026-48020

Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.48, 3.6.19, and 3.7.3, 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...

CVE-2026-48020

Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.48, 3.6.19, and 3.7.3, 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...

CVE-2026-48020 Traefik StripPrefix Route-Level Auth Bypass via Path Normalization

Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.48, 3.6.19, and 3.7.3, 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...

CVE-2026-48020 Traefik StripPrefix Route-Level Auth Bypass via Path Normalization

Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.48, 3.6.19, and 3.7.3, 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...

Traefik 2.x < 2.11.48 / 3.x < 3.6.19 / 3.7.x < 3.7.3 Authentication Bypass (CVE-2026-48020)

The version of Traefik installed on the remote macOS host is 2.x prior to 2.11.48, 3.x prior to 3.6.19, or 3.7.x prior to 3.7.3. It is, therefore, affected by an authentication bypass vulnerability: - The StripPrefix middleware allows unauthenticated attackers to bypass route-level authentication...

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...

GHSA-XF64-8MW2-4GR2 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...

PT-2026-48684

Name of the Vulnerable Software and Affected Versions Traefik versions prior to 2.11.48 Traefik versions prior to 3.6.19 Traefik versions prior to 3.7.3 Description An unauthenticated attacker can bypass route-level authentication and authorization in Traefik when PathPrefix-based public routes a...

Insufficient Verification of Data Authenticity

Overview Affected versions of this package are vulnerable to Insufficient Verification of Data Authenticity in the ForwardAuth middleware when trustForwardHeader is set to false and the deployment is behind a trusted upstream proxy. An attacker can gain unauthorized access to protected backend...