CVE-2026-54763
traefik: Traefik: Identity spoofing via improper header handling in authentication middlewares
Severidad por fuente
La etiqueta propia de Trivy es CRITICAL. Crítica según NVD. Más baja según GHSA (alta), Red Hat (alta).
Descripción
Traefik is an HTTP reverse proxy and load balancer. Prior to v2.11.51, v3.6.22, and v3.7.6, Traefik's BasicAuth, DigestAuth, and ForwardAuth middlewares strip canonical-cased spoofed identity headers before writing Traefik's own value, but do not account for underscore-variant header names, which many backends normalize identically to dashed forms. An attacker able to reach a protected route can inject an underscore-variant header that survives Traefik's stripping and reaches the backend alongside, or on the unauthenticated ForwardAuth authResponseHeaders path instead of, the value Traefik intended to set, spoofing identity or authorization context. This issue is fixed in versions v2.11.51, v3.6.22, and v3.7.6.
Paquetes afectados y versiones corregidas
| Fuente | Paquete | Corregido en |
|---|---|---|
| alpine edge | traefik | 3.7.7-r0 |
| go::GitHub Security Advisory Go | github.com/traefik/traefik/v2, github.com/traefik/traefik/v3 | 2.11.51 y 1 más |
| minimos | traefik-3, traefik-fips-3 | 3.7.6-r0 |
| rapidfort alpine 3.20 | traefik | 3.7.7-r0 |
| rapidfort alpine 3.21 | traefik | 3.7.7-r0 |
| rapidfort alpine 3.22 | traefik | 3.7.7-r0 |
| rapidfort alpine 3.23 | traefik | 3.7.7-r0 |
| rapidfort alpine 3.24 | traefik | 3.7.7-r0 |
Mostrar las 10 entradas de 8 fuentes
| Fuente | Paquete | Corregido en |
|---|---|---|
| alpine edge | traefik | 3.7.7-r0 |
| go::GitHub Security Advisory Go | github.com/traefik/traefik/v2 | 2.11.51 |
| go::GitHub Security Advisory Go | github.com/traefik/traefik/v3 | 3.6.22, 3.7.6 |
| minimos | traefik-3 | 3.7.6-r0 |
| minimos | traefik-fips-3 | 3.7.6-r0 |
| rapidfort alpine 3.20 | traefik | 3.7.7-r0 |
| rapidfort alpine 3.21 | traefik | 3.7.7-r0 |
| rapidfort alpine 3.22 | traefik | 3.7.7-r0 |
| rapidfort alpine 3.23 | traefik | 3.7.7-r0 |
| rapidfort alpine 3.24 | traefik | 3.7.7-r0 |
Referencias
- https://access.redhat.com/security/cve/CVE-2026-54763
- https://github.com/traefik/traefik
- https://github.com/traefik/traefik/commit/108a5264473a2cbc8f12d6d691a3c6553cdf2c1b
- https://github.com/traefik/traefik/pull/13262
- https://github.com/traefik/traefik/releases/tag/v2.11.51
- https://github.com/traefik/traefik/releases/tag/v3.6.22
- https://github.com/traefik/traefik/releases/tag/v3.7.6
- https://github.com/traefik/traefik/security/advisories/GHSA-x677-9fxg-v5c5