Description

Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.8, nginx-ui exposes a backup restore endpoint (POST /api/restore) that is completely unauthenticated during the first 10 minutes after process startup on any fresh installation. An unauthenticated remote attacker can upload a crafted backup archive that overwrites the application's configuration file (app.ini) and SQLite database. Because the attacker controls the restored app.ini, they can inject an arbitrary OS command into the TestConfigCmd setting. After the application automatically restarts to apply the restored config, a single follow-up request triggers that command as the user running nginx-ui — typically root in Docker deployments. This issue has been patched in version 2.3.8.

INFO

Published Date :

2026-05-04T20:13:22.196Z

Last Modified :

2026-05-05T15:50:36.447Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-42238 vulnerability.

Vendors Products
0xjacky
  • Nginx-ui
Nginxui
  • Nginx Ui
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-42238.

URL Resource
https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.8 cve-icon cve-icon
https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-4pvg-prr3-9cxr cve-icon cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact