Improper Authentication Affecting traefik-3 package, versions <3.7.11-r0


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
0.44% (36th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-TRAEFIK3-19889557
  • published18 Sept 2026
  • disclosed4 Sept 2026

Introduced: 4 Sep 2026

CVE-2026-85596  (opens in a new tab)
CWE-287  (opens in a new tab)

How to fix?

Upgrade Minimos:latest traefik-3 to version 3.7.11-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream traefik-3 package and not the traefik-3 package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1