Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Traefik | Traefik | >= 3.7.0, < 3.7.14 |
Related Weaknesses (CWE)
References
- https://github.com/traefik/traefik/security/advisories/GHSA-rv2h-qh7j-xrjwVendor Advisory
- https://www.vulncheck.com/advisories/traefik-3.7.0-before-3.7.14-client-ca-mix-uThird Party Advisory
FAQ
What is CVE-2026-114638?
CVE-2026-114638 is a vulnerability with a CVSS score of 8.7 (HIGH). 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 nor...
How severe is CVE-2026-114638?
CVE-2026-114638 has been rated HIGH with a CVSS base score of 8.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-114638?
Check the references section above for vendor advisories and patch information. Affected products include: Traefik Traefik.