← CVE Radar
CVE-2026-114656Traefik before 2.11.58 and 3.7.13 mTLS Bypass via Negated Host Matcher
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.
6.9 MEDIUMEPSS 0.15%Not in KEVNVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 6.9 | MEDIUM | 4.0VulnCheck (CNA) | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N |
| 9.3 | CRITICAL | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N |
| 7.5 | HIGH | 3.1VulnCheck (CNA) | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N |
Details
- CVE ID
- CVE-2026-114656
- Status
- Analyzed
- Assigner (CNA)
- VulnCheck
- Published
- Oct 22, 2026
- Last modified
- 2026-11-04 16:17 UTC
- Weaknesses
- CWE-436 · Interpretation Conflict
Affected Products
As published by the CNA in the CVE record.
traefiktraefik1 version range
- before 2.11.58
traefiktraefik1 version range
- 3.0.0 before 3.7.13