CVE-2026-54762
CVE-2026-54762 · Traefik Kubernetes Ingress NGINX provider fails open when auth-secret resolution fails
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Traefik is an HTTP reverse proxy and load balancer. From 3.7.0-ea.1 until 3.7.5, there is a medium severity vulnerability in Traefik's Kubernetes Ingress NGINX provider that causes affected routes to fail open. When an Ingress explicitly enables BasicAuth or DigestAuth through the supported nginx.ingress.kubernetes.io/auth-type and auth-secret annotations, but the referenced auth Secret cannot be resolved or parsed, Traefik logs the resolution error, skips installing the authentication middleware, and still emits a router to the backend service. A route that operators intended to protect is therefore published to the data plane without its authentication control, allowing unauthenticated access to the backend. The trigger is an invalid or unresolved auth dependency — a missing, malformed, unreadable, or policy-denied Secret — rather than an intentionally unprotected route. This vulnerability is fixed in 3.7.5.
CVSS 5.9 · Medium · EPSS 0.4%
- Published
- Updated
Stack: web
Affected products and versions
traefik
- Versions
- >= 3.7.0-ea.1, < 3.7.5: Affected
No fix published