VULNERABILITY INTELLIGENCE

CVE-2026-32695

CVSS score7.7 HIGH
EPSS probability0.47%
CISA KEVNot currently listed
Published2026-03-27
Last modified2026-07-15
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-74
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-917

Primary references