CVE-2026-33027: Nginxui Nginx UI

Medium severity, CVSS 6.5. EPSS: 0.5% 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 configuration improperly handles URL-encoded traversal sequences. When specially crafted paths are supplied, the backend resolves them to the base Nginx configuration directory and executes the operation on the base directory (/etc/nginx). In particular, this allows an authenticated user to remove the entire /etc/nginx directory, resulting in a partial Denial of Service. This issue has been patched in version 2.3.4.

Affected products

• Nginxui Nginx UI: before 2.3.4 (fixed in 2.3.4)

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