Vulnerabilities / CVE-2026-114638

CVE-2026-114638

Published 2026-10-22 · published (not yet in NVD)

CVE-2026-114638

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

7.0 HIGH
CVSS 4.0 · CNA

0.2%
chance of exploitation in the next 30 days (EPSS; higher than 12% of CVEs)

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

7.0CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:NCNA

8.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:NCNA

Affected products

traefik traefik: 3.7.0 to < 3.7.14

Weakness: CWE-287

Also known as: GHSA-rv2h-qh7j-xrjw

2 references (advisories, patches, write-ups)

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

Sources: CVE.org, OSV.dev, FIRST EPSS. Missing ones did not answer or have no record yet.

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