CVE-2026-25651: Tgies Client-Certificate-Auth

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

client-certificate-auth is middleware for Node.js implementing client SSL certificate authentication/authorization. Versions 0.2.1 and 0.3.0 of client-certificate-auth contain an open redirect vulnerability. The middleware unconditionally redirects HTTP requests to HTTPS using the unvalidated Host header, allowing an attacker to redirect users to arbitrary domains. This vulnerability is fixed in 1.0.0.

Affected products

• Tgies Client-Certificate-Auth: from 0.2.1, before 1.0.0 (fixed in 1.0.0)

Published 2026-02-06. Last modified 2026-06-17.