{"id":"CVE-2026-114656","aliases":["GHSA-2272-4vv8-65ww"],"url":"https://o3.security/vulnerability/CVE-2026-114656","summary":"Traefik before 2.11.58 and 3.7.13 mTLS Bypass via Negated Host Matcher","details":"Traefik before 2.11.58 and 3.7.13 contains an authentication bypass vulnerability that allows unauthenticated clients to skip client-certificate checks because negated Host matchers are counted as served domains. Attackers can reach backends protected by RequireAndVerifyClientCert when a router rule with !Host() creates a TLS options conflict that falls back to the default options.","published":"2026-10-22T01:43:42.056Z","modified":"2026-10-24T02:31:00.183440207Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114656.json"},{"type":"ADVISORY","url":"https://github.com/traefik/traefik/security/advisories/GHSA-2272-4vv8-65ww"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114656"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.13-mtls-bypass-via-negated-host-matcher"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T02:31:00.183440207Z"}}