CVE-2026-48020
github.com/traefik/traefik: Traefik: Authentication bypass in StripPrefix middleware allows unauthorized access to protected paths
Sévérité par source
Le label propre à Trivy est CRITICAL. Critique selon NVD. Plus basse selon GHSA (élevée), Red Hat (élevée).
Description
Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.48, 3.6.19, and 3.7.3, there is a high severity vulnerability in Traefik's StripPrefix middleware that allows an unauthenticated attacker to bypass route-level authentication and authorization. When a public router matches on a PathPrefix rule and applies the StripPrefix middleware, a request path containing .. or its percent-encoded form %2e%2e can match the public route at routing time and then, after the prefix is stripped and the path is normalized, resolve to a path served by a separate, authenticated router. As a result, an attacker can reach protected backend paths — such as admin or internal configuration endpoints — without satisfying the authentication middleware attached to the protected router. This vulnerability is fixed in 2.11.48, 3.6.19, and 3.7.3.
Paquets affectés et versions corrigées
| Source | Paquet | Corrigé en |
|---|---|---|
| alpine edge | traefik | 3.7.7-r0 |
| go::GitHub Security Advisory Go | github.com/traefik/traefik/v2, github.com/traefik/traefik/v3 | 2.11.48 et 1 autres |
| minimos | traefik-3, traefik-fips-3 | 3.7.3-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 |
Afficher les 10 entrées de 8 sources
| Source | Paquet | Corrigé en |
|---|---|---|
| alpine edge | traefik | 3.7.7-r0 |
| go::GitHub Security Advisory Go | github.com/traefik/traefik/v2 | 2.11.48 |
| go::GitHub Security Advisory Go | github.com/traefik/traefik/v3 | 3.6.19, 3.7.3 |
| minimos | traefik-3 | 3.7.3-r0 |
| minimos | traefik-fips-3 | 3.7.3-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 |
Références
- https://access.redhat.com/errata/RHSA-2026:62260
- https://access.redhat.com/security/cve/CVE-2026-48020
- https://bugzilla.redhat.com/show_bug.cgi?id=2491915
- https://github.com/traefik/traefik
- https://github.com/traefik/traefik/releases/tag/v2.11.48
- https://github.com/traefik/traefik/releases/tag/v3.6.19
- https://github.com/traefik/traefik/releases/tag/v3.7.3
- https://github.com/traefik/traefik/security/advisories/GHSA-xf64-8mw2-4gr2