CVE-2026-48020
Gravedad CVSS v4.0:
ALTA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
23/06/2026
Última modificación:
15/07/2026
Descripción
*** Pendiente de traducción *** 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.
Impacto
Puntuación base 4.0
7.80
Gravedad 4.0
ALTA
Puntuación base 3.x
10.00
Gravedad 3.x
CRÍTICA
Productos y versiones vulnerables
| CPE | Desde | Hasta |
|---|---|---|
| cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* | 2.11.48 (excluyendo) | |
| cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* | 3.0.0 (incluyendo) | 3.6.19 (excluyendo) |
| cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* | 3.7.0 (incluyendo) | 3.7.3 (excluyendo) |
Para consultar la lista completa de nombres de CPE con productos y versiones, ver esta página
Referencias a soluciones, herramientas e información
- 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
- https://access.redhat.com/security/cve/CVE-2026-48020
- https://bugzilla.redhat.com/show_bug.cgi?id=2491915
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48020.json



