CVE-2026-33029: Nginx UI: DoS via Negative Integer Input in Logrotate Interval

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-30 · updated 2026-06-17
Weakness: CWE-20

Description

Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, an input validation vulnerability in the logrotate configuration allows an authenticated user to cause a complete Denial of Service (DoS). By submitting a negative integer for the rotation interval, the backend enters an infinite loop or an invalid state, rendering the web interface unresponsive. This issue has been patched in version 2.3.4.

Affected products

0xJacky nginx-ui: before 2.3.4 — fixed in 2.3.4

How to fix

Upgrade to a fixed version: 0xJacky nginx-ui 2.3.4. Check the vendor advisory for mitigations.

References

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