GO-2026-5760 Traefik Kubernetes CRD allows unauthorized cross-namespace middleware binding in github.com/traefik/traefik

Traefik Kubernetes CRD allows unauthorized cross-namespace middleware binding in github.com/traefik/traefik...

EUVD-2026-26432

Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is a potential vulnerability in Traefik's Kubernetes CRD provider cross-namespace isolation enforcement. When providers.kubernetesCRD.allowCrossNamespace=false, Traefik correctly rejects...