CVE-2026-32695: Traefik

High severity, CVSS 7.7. EPSS: 0.5% chance of exploitation in the next 30 days.

Traefik is an HTTP reverse proxy and load balancer. Prior to versions 3.6.11 and 3.7.0-ea.2, Traefik's Knative provider builds router rules by interpolating user-controlled values into backtick-delimited rule expressions without escaping. In live cluster validation, Knative `rules[].hosts[]` was exploitable for host restriction bypass (for example `tenant.example.com`) || Host(`attacker.com`), producing a router that serves attacker-controlled hosts. Knative `headers[].exact` also allows rule-syntax injection and proves unsafe rule construction. In multi-tenant clusters, this can route unauthorized traffic to victim services and lead to cross-tenant traffic exposure. Versions 3.6.11 and 3.7.0-ea.2 patch the issue.

Affected products

• Traefik Traefik: before 3.6.11 (fixed in 3.6.11); version 3.7.0 only

Published 2026-03-27. Last modified 2026-07-15.