CVE-2026-114638

Traefik v3.7.0 before v3.7.14 contains an improper authentication vulnerability in the Kubernetes Ingress NGINX provider that merges client CAs when auth-tls-secret names collide after dot-to-dash normalization. Attackers holding certificates from another host's CA can access a host requiring its own client CA, while that host's legitimate clients are refused.

CVSS v3 8.7 HIGH

8.7^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/traefik/traefik/security/advisories/GHSA-rv2h-qh7j-xrjw	Vendor Advisory
https://www.vulncheck.com/advisories/traefik-3.7.0-before-3.7.14-client-ca-mix-up-via-auth-tls-secret-name-collision	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*

History

27 Oct 2026, 14:17

Type	Values Removed	Values Added
References	~~() https://github.com/traefik/traefik/security/advisories/GHSA-rv2h-qh7j-xrjw -~~	() https://github.com/traefik/traefik/security/advisories/GHSA-rv2h-qh7j-xrjw - Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/traefik-3.7.0-before-3.7.14-client-ca-mix-up-via-auth-tls-secret-name-collision -~~	() https://www.vulncheck.com/advisories/traefik-3.7.0-before-3.7.14-client-ca-mix-up-via-auth-tls-secret-name-collision - Third Party Advisory
CPE		cpe:2.3:a:traefik:traefik::::::::
First Time		Traefik Traefik traefik

22 Oct 2026, 02:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-22 02:16

Updated : 2026-10-27 14:17

NVD link : CVE-2026-114638

Mitre link : CVE-2026-114638

CVE.ORG link : CVE-2026-114638

JSON object : View

Products Affected

traefik

traefik

CWE

CWE-287

Improper Authentication

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