High severity · published Mar 30, 2026
CVE-2026-33028
Nginx UI: Race Condition Leads to Persistent Data Corruption and Service Collapse
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NG
nginx-ui · 0xJacky
< 2.3.4 · source: vendor
CO
Cosy · Uozi
before 1.30.1 · source: NVD
NU
Nginx UI · Nginxui
before 2.3.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33028
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33028
Product
https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.4
Exploit
https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-m468-xcm6-fxg4
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