Open Redirect in Tgies Client-Certificate-Auth
CVE-2026-25651
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.
Vulnerability class: Open Redirect
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (9.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Tgies Client-Certificate-Auth — versions >= 0.2.1, < 1.0.0
Weakness classification (CWE)
References
- github.com/tgies/client-certificate-auth/security/advisories/GHSA-m4w9-gch5-c2g4 (Exploit, Vendor Advisory)
- github.com/tgies/client-certificate-auth/releases/tag/v1.0.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-25651?
- CVE-2026-25651 is a medium-severity vulnerability in Tgies Client-Certificate-Auth, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2026-02-06.
- How severe is CVE-2026-25651?
- Medium severity. CVSS v3 base score is 6.1 out of 10.