CVE-2026-88009

A flaw was found in Traefik, an open source HTTP reverse proxy and load balancer. This vulnerability allows a remote attacker to bypass security controls by sending a specially crafted HTTP/1 request. The request target is incorrectly processed, leading to cross-vhost routing bypass, path-scoped...

GHSA-F52W-8J3H-J724 Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging

Summary Traefik accepts an HTTP/1.x request whose request-target is in rootless / opaque form for example GET http:http://internal-vhost/admin HTTP/1.1. Go parses this into URL.Opaque with an empty URL.Path, so Traefik evaluates all routing, path-sanitization, middleware and access-log decisions...

Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging

Summary Traefik accepts an HTTP/1.x request whose request-target is in rootless / opaque form for example GET http:http://internal-vhost/admin HTTP/1.1. Go parses this into URL.Opaque with an empty URL.Path, so Traefik evaluates all routing, path-sanitization, middleware and access-log decisions...

CVE-2026-88009 Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging

Traefik is an open source HTTP reverse proxy and load balancer. Prior to 2.11.57, and 3.7.13, Traefik accepts a rootless HTTP/1 request target that Go stores in URL.Opaque while leaving URL.Path empty. The rewriteRequestBuilder path evaluates routing, path sanitization, forwardAuth,...

CVE-2026-88009

Traefik , an open-source HTTP reverse proxy and load balancer, is affected by a request-target handling flaw prior to 2.11.57 and 3.7.13 . A rootless HTTP/1 request target is stored by Go in URL.Opaque while URL.Path remains empty. The rewriteRequestBuilder evaluates routing, path sanitization, f...

CVE-2026-88009 Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging

Traefik is an open source HTTP reverse proxy and load balancer. Prior to 2.11.57, and 3.7.13, Traefik accepts a rootless HTTP/1 request target that Go stores in URL.Opaque while leaving URL.Path empty. The rewriteRequestBuilder path evaluates routing, path sanitization, forwardAuth,...

CVE-2026-88009 Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging

Traefik is an open source HTTP reverse proxy and load balancer. Prior to 2.11.57, and 3.7.13, Traefik accepts a rootless HTTP/1 request target that Go stores in URL.Opaque while leaving URL.Path empty. The rewriteRequestBuilder path evaluates routing, path sanitization, forwardAuth,...

CVE-2026-88009: Inconsistent Interpretation of HTTP Requests

Traefik is an open source HTTP reverse proxy and load balancer. Prior to 2.11.57, and 3.7.13, Traefik accepts a rootless HTTP/1 request target that Go stores in URL.Opaque while leaving URL.Path empty. The rewriteRequestBuilder path evaluates routing, path sanitization, forwardAuth,...

PT-2026-89471

Summary Traefik accepts an HTTP/1.x request whose request-target is in rootless / opaque form for example GET http:http://internal-vhost/admin HTTP/1.1. Go parses this into URL.Opaque with an empty URL.Path, so Traefik evaluates all routing, path-sanitization, middleware and access-log decisions...