CVE-2026-88009
Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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, encodedCharacters, and access logging against a path normalized to / but forwards URL.Opaque verbatim to the backend, allowing cross-vhost routing bypass, path-scoped authorization bypass, and access-log evasion when the backend interprets the opaque target as a path. This issue is fixed in 2.11.57 and 3.7.13.
| CWE | CWE-444 CWE-1286 |
| Vendor | traefik |
| Product | traefik |
| Published | Sep 10, 2026 |
| Last Updated | Sep 10, 2026 |
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Affected Versions
traefik / traefik
< 2.11.57 >= 3.0.0, < 3.7.13
References
github.com: https://github.com/traefik/traefik/security/advisories/GHSA-f52w-8j3h-j724 github.com: https://github.com/traefik/traefik/pull/13796 github.com: https://github.com/traefik/traefik/commit/58d1e9ca204526823211e30fd4634101c59d58e9 github.com: https://github.com/traefik/traefik/releases/tag/v2.11.57 github.com: https://github.com/traefik/traefik/releases/tag/v3.7.13