CVE-2026-32695
CVE-2026-32695 · Traefik has Knative Ingress Rule Injection that Allows Host Restriction Bypass
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 6.3 · Medium · EPSS 0.6%
- Published
- Updated
Stack: web
Affected products and versions
traefik
- Versions
- < 3.6.11: Affected
- >= 3.7.0-ea.1, < 3.7.0-ea.2: Affected
No fix published
Original sources
- https://github.com/traefik/traefik/security/advisories/GHSA-67jx-r9pv-98rj
- https://github.com/traefik/traefik/releases/tag/v3.6.11
- https://github.com/traefik/traefik/releases/tag/v3.7.0-ea.2
- https://access.redhat.com/security/cve/CVE-2026-32695
- https://bugzilla.redhat.com/show_bug.cgi?id=2452235
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32695.json
- https://access.redhat.com/errata/RHSA-2026:10175
- https://nvd.nist.gov/vuln/detail/CVE-2026-32695