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CVE-2026-114638GHSA-rv2h-qh7j-xrjw

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

traefik traefik
Open in ThreatlineRecord JSON
CVSS
7.0High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.19%Chance of exploitation activity in the next 30 days, higher than 7% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in3.7.14Fixed versionCVE List
Published22 Oct 2026Updated 23 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 2

  • traefikaffected: 3.7.0 before 3.7.14CVE List
  • traefikunaffected: 3.7.14CVE List

References 2