{"id":"CVE-2026-32695","aliases":["GHSA-67jx-r9pv-98rj","GO-2026-4880"],"url":"https://o3.security/vulnerability/CVE-2026-32695","summary":"Traefik has Knative Ingress Rule Injection that Allows Host Restriction Bypass","details":"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.","published":"2026-03-27T13:47:03.645Z","modified":"2026-08-12T03:51:41.107497303Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","fixedVersion":"3.6.11"},{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","fixedVersion":"3.7.0-ea.2"},{"ecosystem":"Go","name":"github.com/traefik/traefik/v2","fixedVersion":null}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/traefik/traefik/releases/tag/v3.6.11"},{"type":"WEB","url":"https://github.com/traefik/traefik/releases/tag/v3.7.0-ea.2"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32695.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10175"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-32695"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32695.json"},{"type":"ADVISORY","url":"https://github.com/traefik/traefik/security/advisories/GHSA-67jx-r9pv-98rj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32695"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2452235"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:41.107497303Z"}}