CVE-2026-114656
Published:October 22, 2026
Updated:October 22, 2026
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.
Affected Packages
https://github.com/traefik/traefik.git (GITHUB):
Affected version(s) >=v2.5.0-rc1 <v2.11.58Fix Suggestion:
Update to version v2.11.58https://github.com/traefik/traefik.git (GITHUB):
Affected version(s) >=v3.0.0-beta1 <v3.7.13Fix Suggestion:
Update to version v3.7.13github.com/traefik/traefik/v2 (GO):
Affected version(s) >=v2.5.0-rc1 <v2.11.58Fix Suggestion:
Update to version v2.11.58github.com/traefik/traefik/v3 (GO):
Affected version(s) >=v3.0.0-beta1 <v3.7.13Fix Suggestion:
Update to version v3.7.13Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Interpretation Conflict