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.
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Thu, 22 Oct 2026 02:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Traefik before 2.11.58 and 3.7.13 mTLS Bypass via Negated Host Matcher | |
| First Time appeared |
Traefik
Traefik traefik |
|
| Weaknesses | CWE-436 | |
| CPEs | cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Traefik
Traefik traefik |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-10-22T01:43:42.056Z
Reserved: 2026-10-21T21:59:05.256Z
Link: CVE-2026-114656
No data.
Status : Received
Published: 2026-10-22T02:16:57.403
Modified: 2026-10-22T02:16:57.403
Link: CVE-2026-114656
No data.
OpenCVE Enrichment
No data.
Weaknesses