How severe is CVE-2026-25651?

CVE-2026-25651 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-25651 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25651?

CVE-2026-25651 affects Tgies Client-certificate-auth. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25651?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-25651 have an EU (EUVD) identifier?

Yes. CVE-2026-25651 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5630.

When was CVE-2026-25651 published?

CVE-2026-25651 was published on 2026-02-06 and last updated on 2026-06-17.

CVE-2026-25651

CVE-2026-25651 is a medium-severity vulnerability in Tgies Client-certificate-auth with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5630
Weakness: CWE-601
Affected product: Tgies Client-certificate-auth
Published: 2026-02-06
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-25651?: CVE-2026-25651 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-25651 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25651?: CVE-2026-25651 affects Tgies Client-certificate-auth. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25651?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-25651 have an EU (EUVD) identifier?: Yes. CVE-2026-25651 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5630.
When was CVE-2026-25651 published?: CVE-2026-25651 was published on 2026-02-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tgies:client-certificate-auth:*:*:*:*:*:node.js:*:*

Other CWE-601 (Open Redirect) vulnerabilities

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