CVE-2026-33433

N/A

Descripcion

Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.42, 3.6.11, and 3.7.0-ea.3, when `headerField` is configured with a non-canonical HTTP header name (e.g., `x-auth-user` instead of `X-Auth-User`), an authenticated attacker can inject their own canonical version of that header to impersonate any identity to the backend. The backend receives two header entries — the attacker-injected canonical one is read first, overriding Traefik's non-canonical write. Versions 2.11.42, 3.6.11, and 3.7.0-ea.3 patch the issue.

Detalles CVE

Puntuacion CVSS v3.1N/A

Publicado3/27/2026

Ultima modificacion3/27/2026

Fuentenvd

Avistamientos honeypot0

Debilidades (CWE)

CWE-290

Referencias

https://github.com/traefik/traefik/releases/tag/v2.11.42(security-advisories@github.com)

https://github.com/traefik/traefik/releases/tag/v3.6.11(security-advisories@github.com)

https://github.com/traefik/traefik/releases/tag/v3.7.0-ea.3(security-advisories@github.com)

https://github.com/traefik/traefik/security/advisories/GHSA-qr99-7898-vr7c(security-advisories@github.com)

Correlaciones IOC

Sin correlaciones registradas

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