Input validation error in nginx-ui - CVE-2026-33029
Published: April 23, 2026
Vulnerability identifier: #VU126941
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-33029
CWE-ID: CWE-20
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 a denial of service.
The vulnerability exists due to improper input validation in the POST /api/settings endpoint when processing the logrotate.interval field. A remote privileged user can send a specially crafted request with a negative integer value to cause a denial of service.
The issue can cause the backend to enter an infinite loop or invalid state, rendering the web interface unresponsive.
How to mitigate CVE-2026-33029
Install security update from vendor's website.