Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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.

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)