Vulnerability Description
Traefik before 2.11.58 and 3.7.13 contains an authentication bypass vulnerability that allows unauthenticated clients to skip client-certificate checks because negated Host matchers are counted as served domains. Attackers can reach backends protected by RequireAndVerifyClientCert when a router rule with !Host() creates a TLS options conflict that falls back to the default options.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Traefik | Traefik | < 2.11.58 |
Related Weaknesses (CWE)
References
- https://github.com/traefik/traefik/security/advisories/GHSA-2272-4vv8-65wwVendor AdvisoryPatch
- https://www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.13-mtls-bypaThird Party Advisory
FAQ
What is CVE-2026-114656?
CVE-2026-114656 is a vulnerability with a CVSS score of 7.5 (HIGH). Traefik before 2.11.58 and 3.7.13 contains an authentication bypass vulnerability that allows unauthenticated clients to skip client-certificate checks because negated Host matchers are counted as ser...
How severe is CVE-2026-114656?
CVE-2026-114656 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-114656?
Check the references section above for vendor advisories and patch information. Affected products include: Traefik Traefik.