What is CVE-2026-33032?

CVE-2026-33032 is a critical-severity vulnerability in 0xjacky Nginx-ui, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-03-30.

How severe is CVE-2026-33032?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2026-33032 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in 0xjacky Nginx-ui

CVE-2026-33032

Nginx UI is a web user interface for the Nginx web server. In versions 2.3.5 and prior, the nginx-ui MCP (Model Context Protocol) integration exposes two HTTP endpoints: /mcp and /mcp_message. While /mcp requires both IP whitelisting and a…

Vulnerability class: Broken Authentication

EPSS: 0.127 (94.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

0xjacky Nginx-ui — versions <= 2.3.5

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

Public proof-of-concept exploits

References

https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-h6c2-x2m2-mwhf (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-33032?: CVE-2026-33032 is a critical-severity vulnerability in 0xjacky Nginx-ui, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-03-30.
How severe is CVE-2026-33032?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2026-33032 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.