0xJacky nginx-ui up to 2.3.3 app.ini race condition

Summaryinfo

A vulnerability identified as problematic has been detected in 0xJacky nginx-ui up to 2.3.3. This issue affects some unknown processing of the file app.ini. Performing a manipulation results in race condition. This vulnerability is reported as CVE-2026-33028. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in 0xJacky nginx-ui up to 2.3.3. It has been classified as problematic. This affects some unknown functionality of the file app.ini. The manipulation with an unknown input leads to a race condition vulnerability. CWE is classifying the issue as CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, the nginx-ui application is vulnerable to a Race Condition. Due to the complete absence of synchronization mechanisms (Mutex) and non-atomic file writes, concurrent requests lead to the severe corruption of the primary configuration file (app.ini). This vulnerability results in a persistent Denial of Service (DoS) and introduces a non-deterministic path for Remote Code Execution (RCE) through configuration cross-contamination. This issue has been patched in version 2.3.4.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-33028 since 03/17/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Additional levels of successful authentication are required for exploitation. Technical details are known, but no exploit is available.

By approaching the search of inurl:app.ini it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 2.3.4 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0931). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• NGINX NGINX

Productinfo

Type

• Web Server

Vendor

• 0xJacky

Name

• nginx-ui

Version

• 2.3.0
• 2.3.1
• 2.3.2
• 2.3.3

Website

• Product: https://github.com/0xJacky/nginx-ui/

CPE 2.3info

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CPE 2.2info

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Exploitinginfo

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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