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TI-2026-20751 Aliases CVE-2026-25651GHSA-m4w9-gch5-c2g4

client-certificate-auth has an Open Redirect via Host Header Injection in HTTP-to-HTTPS redirect

Priority LOW 26CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-601.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00183 7th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed client-certificate-auth (tgies): 1.0.0client-certificate-auth (npm): 1.0.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
tgiesclient-certificate-auth0.2.1 to before 1.0.01.0.0Patch availableCNA
—client-certificate-auth (npm)0.2.1 to before 1.0.01.0.0Patch availableGHSA-m4w9-gch5-c2g4
  • client-certificate-auth Vendortgies Affected 0.2.1 to before 1.0.0 Fixed in 1.0.0 Patch available CNA
  • client-certificate-auth (npm) Vendor— Affected 0.2.1 to before 1.0.0 Fixed in 1.0.0 Patch available GHSA-m4w9-gch5-c2g4

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:tgies:client-certificate-auth:*:*:*:*:*:node.js:*:*0.2.1 to before 1.0.0Vulnerabletgies
  • cpe:2.3:a:tgies:client-certificate-auth:*:*:*:*:*:node.js:*:* Versions 0.2.1 to before 1.0.0 Vulnerable ·tgies

Remediation

  • Fix · CNA client-certificate-auth (tgies) Fixed in 1.0.0
  • Fix · GHSA-m4w9-gch5-c2g4 client-certificate-auth (npm) Fixed in 1.0.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-25651
  2. 2026-10-03 Alias added: GHSA-m4w9-gch5-c2g4

References

Exploit 1

Advisory 1

Other 3

Sources

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