CVE-2026-114638

Traefik v3.7.0 before v3.7.14 Client CA Mix-up via auth-tls-secret Name Collision

State: Published
Severity: 7.0 High
Published: Oct 22, 2026
Updated: Oct 23, 2026
Reserved: Oct 21, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	7.0 High	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N	VulnCheck
3.1	8.7 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N	VulnCheck

Weaknesses

CWE-287 Improper Authentication

Affected Products

Product	Versions
traefiktraefik	3.7.0 to before 3.7.14Affected 3.7.14Not affected

References

GitHub Security Advisory (GHSA-rv2h-qh7j-xrjw)vendor-advisory
VulnCheck Advisory: Traefik v3.7.0 before v3.7.14 Client CA Mix-up via auth-tls-secret Name Collisionthird-party-advisory

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