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
Affected Vendors & Products
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
Sign in to view the affected projects.
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