Vulnerability · Published Oct 22, 2026 · Assigned by VulnCheck
CVE-2026-114638Traefik v3.7.0 before v3.7.14 Client CA Mix-up via auth-tls-secret Name Collision
High 8.7
In plain English
A high-severity improper authentication in traefik from traefik. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
Severity (CVSS 3.1)8.7High
Exploit odds (30 days)0.2%top 87.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Traefik v3.7.0 before v3.7.14 contains an improper authentication vulnerability in the Kubernetes Ingress NGINX provider that merges client CAs when auth-tls-secret names collide after dot-to-dash normalization. Attackers holding certificates from another host's CA can access a host requiring its own client CA, while that host's legitimate clients are refused.
Affected products (as reported)
Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
References
- GitHub Security Advisory (GHSA-rv2h-qh7j-xrjw) vendor-advisory
- VulnCheck Advisory: Traefik v3.7.0 before v3.7.14 Client CA Mix-up via auth-tls-secret Name Collision third-party-advisory