CVE-2026-114656

CriticalCVSS 9.3/10Last modified Nov 4, 2026

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.

Metrics

CVSS 3.1 9.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

Weakness enumeration

CWE-436

Affected software

Vendor	Product	Versions
traefik	traefik	< 2.11.58
traefik	traefik	>= 3.0.0, < 3.7.13

References

Timeline

Published: Oct 22, 2026
Last modified: Nov 4, 2026
NVD status: Analyzed

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