High 8.7Published Oct 21, 2026

CVE-2026-114638Traefik v3.7.0 before v3.7.14 Client CA Mix-up via auth-tls-secret Name Collision

Updated under an hour ago (Oct 28, 2026, 9:40 AM ET)

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It affects traefik. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.22%, higher than 12% of scored CVEs.

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Exploited in the last 30 days

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: 8.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Weakness (CWE): CWE-287
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.22% (percentile 12)
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: Oct 23, 2026
First seen by InfoSec Signals: Oct 21, 2026

Affected products

Affected products

traefik traefik traefik:traefik (from the name)	from 3.7.0 before 3.7.14; 3.7.14 not affected	CNA record
traefik traefik traefik:traefik	from 3.7.0 before 3.7.14	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.