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CVE-2026-33028— Nginx UI: Race Condition Leads to Persistent Data Corruption and Service Collapse

Quick assessment

Affected
0xJacky nginx-ui
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Nginx UI是Jacky个人开发者的一个 Nginx 的 WebUI。 Nginx UI 2.3.4之前版本存在竞争条件问题漏洞，该漏洞源于存在竞争条件，由于缺乏同步机制和非原子文件写入，可能导致主配置文件损坏，引发持久性拒绝服务或远程代码执行。

AI Predicted 8.1 Difficulty: Hard EPSS 0.59% · P46
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I. Basic Information for CVE-2026-33028

Vulnerability Information
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Vulnerability Title
Nginx UI: Race Condition Leads to Persistent Data Corruption and Service Collapse
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
Nginx UI 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nginx UI是Jacky个人开发者的一个 Nginx 的 WebUI。 Nginx UI 2.3.4之前版本存在竞争条件问题漏洞，该漏洞源于存在竞争条件，由于缺乏同步机制和非原子文件写入，可能导致主配置文件损坏，引发持久性拒绝服务或远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
0xJacky nginx-ui < 2.3.4 -

II. Public POCs for CVE-2026-33028

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III. Intelligence Information for CVE-2026-33028

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Vendor Advisories for CVE-2026-33028 (1)

Vendor Pages for CVE-2026-33028 (1)

Same Patch Batch · 0xJacky · 2026-03-30 · 6 CVEs total

CVE-2026-33032 9.8 CRITICAL Nginx UI: Unauthenticated MCP Endpoint Allows Remote Nginx Takeover
CVE-2026-33030 8.8 HIGH Nginx UI: Unencrypted Storage of DNS API Tokens and ACME Private Keys
CVE-2026-33029 Nginx UI: DoS via Negative Integer Input in Logrotate Interval
CVE-2026-33026 nginx-ui Backup Restore Allows Tampering with Encrypted Backups
CVE-2026-33027 Nginx UI: Improper Path Validation Allows Recursive Deletion of the Nginx Configuration Di

IV. Related Vulnerabilities

Same product: nginx-ui
Same vendor: 0xJacky
Same weakness: CWE-362

V. Comments for CVE-2026-33028

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