CVE-2026-33028: Nginxui Nginx UI

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, the nginx-ui application is vulnerable to a Race Condition. Due to the complete absence of synchronization mechanisms (Mutex) and non-atomic file writes, concurrent requests lead to the severe corruption of the primary configuration file (app.ini). This vulnerability results in a persistent Denial of Service (DoS) and introduces a non-deterministic path for Remote Code Execution (RCE) through configuration cross-contamination. This issue has been patched in version 2.3.4.

Affected products

  • Nginxui Nginx UI: before 2.3.4 (fixed in 2.3.4)
  • Uozi Cosy: before 1.30.1 (fixed in 1.30.1)

Published 2026-03-30. Last modified 2026-06-17.