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.

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

EPSS: 0.002 (6.4th percentile) — read the EPSS interpretation.

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.

Affected products

Tgies Client-certificate-auth — versions >= 0.2.1, < 1.0.0

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, 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.