CVE-2026-85596
github.com/traefik/traefik: Traefik: Authentication bypass due to TLS configuration conflict
Severidad por fuente
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Descripción
Traefik versions >= v3.7.0 and <= v3.7.10 contain an authentication bypass in the Kubernetes Ingress NGINX provider. The TLS option generated for an Ingress carrying the nginx.ingress.kubernetes.io/auth-tls-secret annotation was named after the Ingress namespace and name. As a result, two Ingress objects sharing the same host, the same client CA secret, and the same client-authentication mode produced two distinct TLS option names for that host. Traefik treats this as a TLS options conflict and falls back to the entry point's default TLS configuration, which does not request a client certificate, so a route configured with nginx.ingress.kubernetes.io/auth-tls-verify-client: "on" becomes reachable without a client certificate. Only the v3.7 line is affected; the issue is fixed in v3.7.11.
Paquetes afectados y versiones corregidas
| Fuente | Paquete | Corregido en |
|---|---|---|
| minimos | traefik-3, traefik-fips-3 | 3.7.11-r0 |
| rapidfort alpine 3.20 | traefik | 3.7.11-r0 |
| rapidfort alpine 3.21 | traefik | 3.7.11-r0 |
| rapidfort alpine 3.22 | traefik | 3.7.11-r0 |
| rapidfort alpine 3.23 | traefik | 3.7.11-r0 |
| rapidfort alpine 3.24 | traefik | 3.7.11-r0 |
Mostrar las 7 entradas de 6 fuentes
| Fuente | Paquete | Corregido en |
|---|---|---|
| minimos | traefik-3 | 3.7.11-r0 |
| minimos | traefik-fips-3 | 3.7.11-r0 |
| rapidfort alpine 3.20 | traefik | 3.7.11-r0 |
| rapidfort alpine 3.21 | traefik | 3.7.11-r0 |
| rapidfort alpine 3.22 | traefik | 3.7.11-r0 |
| rapidfort alpine 3.23 | traefik | 3.7.11-r0 |
| rapidfort alpine 3.24 | traefik | 3.7.11-r0 |
Referencias
- https://access.redhat.com/security/cve/CVE-2026-85596
- https://github.com/traefik/traefik/security/advisories/GHSA-j994-9gqj-9hwq
- https://nvd.nist.gov/vuln/detail/CVE-2026-85596
- https://www.cve.org/CVERecord?id=CVE-2026-85596
- https://www.vulncheck.com/advisories/traefik-3.7-authentication-bypass-via-tls-option-conflict