Auth bypass in Traefik
CVE-2026-119572
Traefik from 3.7.0-ea.1 before 3.7.15 contains an authentication bypass vulnerability in the Kubernetes Ingress NGINX provider that silently disables mTLS configured via the auth-tls-secret annotation. When another Ingress declares a path on the same host without matching auth-tls settings, Traefik falls back to default TLS options, letting unauthenticated attackers reach backends requiring client certificates.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/traefik/traefik/security/advisories/GHSA-p8wx-ph99-xgcr (vendor-advisory)
- www.vulncheck.com/advisories/traefik-3.7.0-ea.1-before-3.7.15-mtls-bypass-via-i… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119572?
- CVE-2026-119572 is a high-severity vulnerability in Traefik, classified under Improper Authentication. CVSS score: 8.7/10. Published 2026-10-30.
- How severe is CVE-2026-119572?
- High severity. CVSS v3 base score is 8.7 out of 10.