CVE-2026-33028

Nginx UI: Race Condition Leads to Persistent Data Corruption and Service Collapse

HIGH
7.5
CVSS Score
Published: March 30, 2026 at 05:59 PM UTC
Updated: June 17, 2026 at 10:36 AM UTC
3 products affected across 3 vendorsNginxuiCosynginx UI

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Severity
HIGH7.5
Exploit prediction
EPSS 0.5%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.3.4
v < 1.30.1
v < 2.3.4
Affected range stops below 2.3.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_CONFIRMExploitMitigationVendor Advisory
Source: cverecord
https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-m468-xcm6-fxg4
x_refsource_MISCProductRelease Notes
Source: cverecord
https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.4

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-362

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