CVE-2026-33032

Published: Mar 30, 2026 Last Modified: Mar 30, 2026

ExploitDB:

Other exploit source:

Google Dorks:

CRITICAL 9,8

Source: [email protected]

Attack Vector: network

Attack Complexity: low

Privileges Required: none

User Interaction: none

Scope: unchanged

Confidentiality: high

Integrity: high

Availability: high

Description

AI Translation Available

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 authentication (AuthRequired() middleware), the /mcp_message endpoint only applies IP whitelisting - and the default IP whitelist is empty, which the middleware treats as 'allow all'. This means any network attacker can invoke all MCP tools without authentication, including restarting nginx, creating/modifying/deleting nginx configuration files, and triggering automatic config reloads - achieving complete nginx service takeover. At time of publication, there are no publicly available patches.

306

Missing Authentication for Critical Function

Draft

Abstraction: Base Structure: Simple

Common Consequences

Security Scopes Affected:

Access Control Other

Potential Impacts:

Gain Privileges Or Assume Identity Varies By Context

Applicable Platforms

Technologies: Cloud Computing, ICS/OT

Likelihood of Exploit: High

View CWE Details

https://github.com/0xJacky/nginx-ui/security/advisories/GHS…

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