{"id":"CVE-2026-114640","aliases":["GHSA-mwrr-6hp4-pxr6"],"url":"https://o3.security/vulnerability/CVE-2026-114640","summary":"Traefik v3.7.0 before v3.7.14 mTLS Header Spoofing via Ingress-NGINX HTTP Router","details":"Traefik from v3.7.0 before v3.7.14 contains an authentication bypass vulnerability in its Kubernetes Ingress-NGINX provider that forwards client-supplied Ssl-Client-* headers on the plaintext HTTP router. When ssl-redirect is disabled alongside auth-tls-pass-certificate-to-upstream, unauthenticated attackers can send Ssl-Client-Verify: SUCCESS with a chosen certificate subject and issuer to impersonate mTLS identities.","published":"2026-10-22T01:43:39.899Z","modified":"2026-10-24T02:48:55.090454623Z","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-2026-114640.json"},{"type":"ADVISORY","url":"https://github.com/traefik/traefik/security/advisories/GHSA-mwrr-6hp4-pxr6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114640"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/traefik-3.7.0-before-3.7.14-mtls-header-spoofing-via-ingress-nginx-http-router"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T02:48:55.090454623Z"}}