Vulnerability in Traefik
CVE-2026-114656
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/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-2272-4vv8-65ww (vendor-advisory)
- www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.13-mtls-bypass-via-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-114656?
- CVE-2026-114656 is a high-severity vulnerability in Traefik, classified under CWE-436. CVSS score: 7.5/10. Published 2026-10-22.
- How severe is CVE-2026-114656?
- High severity. CVSS v3 base score is 7.5 out of 10.