CVE-2026-25651 json
client-certificate-auth has an Open Redirect via Host Header Injection in HTTP-to-HTTPS redirect
published 9mo ago modified 4mo ago also GHSA-m4w9-gch5-c2g4 , EUVD-2026-5630
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 7%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm client-certificate-auth 1.0.0
- tgies client-certificate-auth 1.0.0
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 9mo ago
Exploit prediction
0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/tgies/client-certificate-auth/security/advisories/GHSA-m4w9-gch5-c2g4 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | client-certificate-auth | >=0.2.1, <1.0.0 |
1.0.0 |
Affected products
- tgies client-certificate-auth
Classification
- Weakness
-
- CWE-601 URL Redirection to Untrusted Site
References
-
github.com
/tgies/client-certificate-auth/commit/8fc995e953db483495be46862965e50fe9e1cc52
web
-
github.com
/tgies/client-certificate-auth/security/advisories/GHSA-m4w9-gch5-c2g4
web, exploit, vendor-advisory
-
github.com
/tgies/client-certificate-auth/releases/tag/v1.0.0
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-25651
advisory
-
github.com
/tgies/client-certificate-auth
package
Sources
- CVE List CVE-2026-25651
- GitHub Advisory GHSA-m4w9-gch5-c2g4
- NVD CVE-2026-25651
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