{"id":"CVE-2026-114640","published":"2026-10-22T02:16:56.947","lastModified":"2026-10-22T15:39:30.497","description":"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.","cvssScore":8.7,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","cwes":["CWE-290"],"vendors":[],"products":[],"references":[{"url":"https://github.com/traefik/traefik/security/advisories/GHSA-mwrr-6hp4-pxr6","tags":[]},{"url":"https://www.vulncheck.com/advisories/traefik-3.7.0-before-3.7.14-mtls-header-spoofing-via-ingress-nginx-http-router","tags":[]}],"exploitRefs":[{"url":"https://github.com/traefik/traefik/security/advisories/GHSA-mwrr-6hp4-pxr6","tags":[]}],"hasPoc":true,"ai":null}