Race Condition Vulnerability in Nginx UI Web Server Interface

CVE-2026-33028

What is CVE-2026-33028?

The Nginx UI web user interface has a vulnerability that arises from a race condition due to the lack of synchronization mechanisms such as Mutex and the use of non-atomic file writes. This flaw can lead to concurrent requests causing corruption of the app.ini primary configuration file. This results in a persistent Denial of Service (DoS), and potentially exposes a non-deterministic path for Remote Code Execution (RCE) through configuration cross-contamination. Users are advised to update to version 2.3.4 or later to mitigate this issue.

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References