Vulnerability Description
Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.8, the GetSettings API handler (api/settings/settings.go:24-65) serializes all settings structs to JSON and returns them to authenticated users. Many sensitive fields are tagged with protected:"true" - however, this tag is only enforced during writes (via ProtectedFill in SaveSettings) and is completely ignored during reads. This exposes 40+ protected fields including JwtSecret (enabling auth token forgery), NodeSecret (enabling cluster node impersonation), OIDC ClientSecret (enabling OAuth account takeover), and the IP whitelist configuration. This issue has been patched in version 2.3.8.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nginxui | Nginx Ui | < 2.3.8 |
Related Weaknesses (CWE)
References
- https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.8Release Notes
- https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-q4w7-56hr-83rmExploitVendor Advisory
- https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-q4w7-56hr-83rmExploitVendor Advisory
FAQ
What is CVE-2026-42223?
CVE-2026-42223 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.8, the GetSettings API handler (api/settings/settings.go:24-65) serializes all settings structs to JSON and returns them...
How severe is CVE-2026-42223?
CVE-2026-42223 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-42223?
Check the references section above for vendor advisories and patch information. Affected products include: Nginxui Nginx Ui.