CVE-2026-114656
Traefik before 2.11.58 and 3.7.13 mTLS Bypass via Negated Host Matcher
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-436 |
| Vendor | traefik |
| Product | traefik |
| Published | Oct 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
None
Affected Versions
traefik / traefik
0 < 2.11.58
traefik / traefik
3.0.0 < 3.7.13