#VU119253 Improper certificate validation in Traefik - CVE-2025-66491

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Main Vulnerability Database Vulnerabilities #VU119253

#VU119253 Improper certificate validation in Traefik - CVE-2025-66491

Published: December 8, 2025


Vulnerability identifier: #VU119253
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-66491
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Traefik
Software vendor:
Containous

Description

The vulnerability allows a remote attacker to perform MitM attack.

the vulnerability exists due to an error in the Traefik NGINX provider managing the nginx.ingress.kubernetes.io/proxy-ssl-verify annotation. A remote attacker can perform MitM attack. 


Remediation

Install updates from vendor's website.

External links