CVE-2026-114656
criticalTraefik before 2.11.58 and 3.7.13 contains an authentication bypass vulnerability that allows unauthenticated clients to skip client-certificate checks because…
Vendor / product: Traefik — traefik
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
9.3
9.3 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-10-22 02:16
Modified: 2026-11-04 16:17
NVD status: Analyzed
Last synced 8 hours ago
Verified against the source API 2026-11-04 16:35 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
traefik / traefik <2.11.58, ≥3.0.0 <3.7.13
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://github.com/traefik/traefik/security/advisories/GHSA-2272-4vv8-65ww
References
- https://github.com/traefik/traefik/security/advisories/GHSA-2272-4vv8-65ww disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.13-mtls-bypass-via-neg... disclosure@vulncheck.com
Data sources
NVD CVE API 2.0 — fetched 2026-11-04 16:35 UTC · record ↗