CVE-2026-88009

Descripción original

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.

Software afectado

• Traefik *≥ 3.0.0 < 3.7.13< 2.11.57 Corregido en: 3.7.13, 2.11.57 coincidencia por repositorio o paquete

Detalles

Publicación

2026-09-11

Última modificación

2026-09-11

Vector CVSS

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

CWE

CWE-444, CWE-1286

Referencias

• cve.org/CVE-2026-88009
• nvd.nist.gov/vuln/detail/CVE-2026-88009
• github.com/traefik/traefik/security/advisories/GHSA-f52w-8j3h-j724
• github.com/traefik/traefik/pull/13796
• github.com/traefik/traefik/commit/58d1e9ca204526823211e30fd4634101c59d58e9
• github.com/traefik/traefik/releases/tag/v2.11.57
• github.com/traefik/traefik/releases/tag/v3.7.13