CVE-2026-25651

Name: CVE-2026-25651
Creator: NVD / NIST
Published: 2026-02-06T19:16:09.897+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.17%

Last modified Jun 17, 2026

CVE-2026-25651 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.17%

6.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-601

Affected Software

Vendor	Product	Versions
Tgies	Client-Certificate-Auth	>= 0.2.1, < 1.0.0

References

https://github.com/tgies/client-certificate-auth/releases/tag/v1.0.0Release Notes
https://github.com/tgies/client-certificate-auth/security/advisories/GHSA-m4w9-gch5-c2g4Exploit, Vendor Advisory

Timeline

Published: Feb 6, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-25651?

How severe is CVE-2026-25651?

CVE-2026-25651 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.

How do I fix CVE-2026-25651?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-25651?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST