CVE-2026-71327: Traefik

High severity, CVSS 8.1. EPSS: 0.5% chance of exploitation in the next 30 days.

Traefik is an open source HTTP reverse proxy and load balancer. From 3.0.0 until 3.6.25 and 3.7.10, Traefik's Kubernetes Gateway API provider in pkg/provider/kubernetes/gateway/httproute.go, grpcroute.go, tcproute.go, and tlsroute.go builds HTTPRoute, GRPCRoute, TCPRoute, and TLSRoute router and service identities by hyphen-concatenating namespace, route name, Gateway identity, entry point, and rule index, allowing colliding Routes to overwrite another namespace's backend. This issue is fixed in 3.6.25 and 3.7.10.

Affected products

• Traefik Traefik: from 3.0.0, before 3.6.25 (fixed in 3.6.25); from 3.7.0, before 3.7.10 (fixed in 3.7.10)

Published 2026-08-06. Last modified 2026-09-16.