CVE-2026-71326
CVE-2026-71326 · Traefik: BasicAuth singleflight key collision allows authenticated identity spoofing
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
Traefik is an open source HTTP reverse proxy and load balancer. From 3.6.11 until 3.6.25 and 3.7.10, Traefik's BasicAuth middleware in pkg/middlewares/auth/basic_auth.go deduplicates concurrent password checks with a singleflight key built from the delimiter-free concatenation of password and secret, allowing an attacker who has a valid credential and the stored hash to authenticate as an unconfigured username when headerField trusts the forwarded identity. This issue is fixed in 3.6.25 and 3.7.10.
CVSS 2.1 · Baja · EPSS 0,3%
- Publicación
- Actualización
Pila tecnológica: web
Productos y versiones afectados
traefik
- Versiones
- >= 3.6.11, < 3.6.25: Afectada
- >= 3.7.0, < 3.7.10: Afectada
Sin corrección publicada
Fuentes originales
- https://github.com/traefik/traefik/security/advisories/GHSA-6765-c87h-8mrf
- https://github.com/traefik/traefik/pull/13572
- https://github.com/traefik/traefik/commit/b5ace8eb5d6779980567f5e75efd2d9e08b7e350
- https://github.com/traefik/traefik/releases/tag/v3.6.25
- https://github.com/traefik/traefik/releases/tag/v3.7.10
- https://nvd.nist.gov/vuln/detail/CVE-2026-71326