Auth bypass in Traefik
CVE-2026-119573
Traefik 3.7.11 before 3.7.15 contains an authorization bypass in the Kubernetes Ingress NGINX provider that skips the cross-namespace check on the auth-tls-secret annotation when a cached client authentication TLS option is reused. Users who can create Ingresses can reference another namespace's CA secret already used by another Ingress, enforcing it on their own routes and learning whether it exists, without disclosure of its contents.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/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-28hp-c82p-8vqj (vendor-advisory)
- www.vulncheck.com/advisories/traefik-3.7.11-before-3.7.15-cross-namespace-autho… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119573?
- CVE-2026-119573 is a medium-severity vulnerability in Traefik, classified under Incorrect Authorization. CVSS score: 4.4/10. Published 2026-10-30.
- How severe is CVE-2026-119573?
- Medium severity. CVSS v3 base score is 4.4 out of 10.