{"id":"CVE-2026-114640","title":"Traefik v3.7.0 before v3.7.14 mTLS Header Spoofing via Ingress-NGINX HTTP Router","summary":"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 al…","severity":"high","cvss":8.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","cvssSource":"cna","cwe":["CWE-290"],"vendor":"traefik","product":"traefik","affected":["traefik >= 3.7.0 < 3.7.14"],"published":"2026-10-22","updated":"2026-10-22","sourceUpdated":"2026-10-22T01:43:39.899Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114640","references":[{"url":"https://github.com/traefik/traefik/security/advisories/GHSA-mwrr-6hp4-pxr6","label":"GitHub Security Advisory (GHSA-mwrr-6hp4-pxr6)"},{"url":"https://www.vulncheck.com/advisories/traefik-3.7.0-before-3.7.14-mtls-header-spoofing-via-ingress-nginx-http-router","label":"VulnCheck Advisory: Traefik v3.7.0 before v3.7.14 mTLS Header Spoofing via Ingress-NGINX HTTP Router"}],"tags":["cve.org"],"ingestedAt":"2026-10-22T02:23:25.185Z","slug":"CVE-2026-114640","body":"## Overview\n\nTraefik 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.\n\n## Affected\n\n- `traefik >= 3.7.0 < 3.7.14`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}