Public proof of conceptFix available

CVE-2026-33028

Q: Is CVE-2026-33028 actively exploited?

A proof-of-concept exploit exists for CVE-2026-33028, but active exploitation has not been confirmed at this time.

Q: What is the CVSS score for CVE-2026-33028?

CVE-2026-33028 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

A public proof of concept exists; no exploitation attested.

Published2026-03-30
Fixed in2.3.4
WeaknessCWE-362

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2026-03-3018:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-33028?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-33028?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Nginxui nginx ui

Branch	Affected	Fixed in	Source
2.3	< 2.3.4	2.3.4	NVD

Uozi cosy

Branch	Affected	Fixed in	Source
1.30	< 1.30.1	1.30.1	NVD · OSV

0xJacky/Nginx-UI

Branch	Affected	Fixed in	Source
1.99	≤ 1.99	no fix published	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Nginxui nginx ui to 2.3.4

Advisories and patches

github.comRelease Notes
github.comMitigation · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionpoc2026-03-30
OpenCVESSVC decisionpoc—
CNACVSS 4.07.1read 2026-10-23
NVDCVSS 3.17.5read 2026-10-23
CNAweakness (CWE)CWE-362read 2026-10-23
FIRST EPSSEPSS score0.6 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 4.0 vector: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: 2026-03-30
Last Modified: 2026-06-17
NVD status: Analyzed

Frequently asked questions

What is CVE-2026-33028?

Is CVE-2026-33028 actively exploited?

A proof-of-concept exploit exists for CVE-2026-33028, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-33028?

CVE-2026-33028 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

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