Race condition in nginx-ui - CVE-2026-33028
Published: April 23, 2026
Vulnerability identifier: #VU126940
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-33028
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Nginx UI
Affected software:
nginx-ui
nginx-ui
Detailed vulnerability description
The vulnerability allows a remote user to cause persistent data corruption and a denial of service.
The vulnerability exists due to a race condition in the settings update pipeline when handling concurrent settings update requests. A remote privileged user can send concurrent crafted POST requests to /api/settings to cause persistent data corruption and a denial of service.
The issue can also cause cross-section contamination in app.ini, which may create a non-deterministic path to command execution if user-controlled values are written into command fields.
How to mitigate CVE-2026-33028
Install security update from vendor's website.