CVE-2026-54761
Gravedad CVSS v4.0:
MEDIA
Tipo:
CWE-284
Control de acceso incorrecto
Fecha de publicación:
23/06/2026
Última modificación:
26/06/2026
Descripción
*** Pendiente de traducción *** Traefik is an HTTP reverse proxy and load balancer. Prior to 3.6.21 and 3.7.5, there is a high severity vulnerability in Traefik's Kubernetes Gateway provider affecting the crossProviderNamespaces allowlist. For HTTPRoute rules that declare multiple (WRR) backendRefs, Traefik evaluates the allowlist against the target backendRef.namespace instead of the route's own namespace. As a result, an HTTPRoute created in a namespace that is not allow-listed can reference a cross-provider TraefikService such as api@internal, dashboard@internal or rest@internal by pointing backendRef.namespace at an allow-listed namespace covered by a Gateway API ReferenceGrant, exposing internal Traefik services on the data plane. Exploitation requires the ability to create an accepted HTTPRoute and a matching ReferenceGrant from an allow-listed namespace; it does not require any change to Traefik static configuration, RBAC, or the deployment itself. This vulnerability is fixed in 3.6.21 and 3.7.5.
Impacto
Puntuación base 4.0
6.00
Gravedad 4.0
MEDIA
Puntuación base 3.x
7.10
Gravedad 3.x
ALTA
Productos y versiones vulnerables
| CPE | Desde | Hasta |
|---|---|---|
| cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* | 3.6.21 (excluyendo) | |
| cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* | 3.7.0 (incluyendo) | 3.7.5 (excluyendo) |
Para consultar la lista completa de nombres de CPE con productos y versiones, ver esta página