CVE-2026-33032: 0xJacky nginx-ui · Missing Authentication
Affects 0xJacky nginx-uiSource CVE Database V5
Exposed hosts seen by OffSeq Mirage · public detection template (Nuclei) · 35% EPSS · CVSS 9.8 Critical.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 35.2% chance of exploitation in 30 days – higher than 98% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 30 Mar 2026
Detectable: evidence found.
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: evidence found.
1 exposed host found; no attack traffic recorded
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, OffSeq Mirage (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| 0xJackynginx-ui | Affected
| Fixed in– |
GitHub0xjacky/nginx-uipkg:github/0xjacky/nginx-uiOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
At the time of publication, no official patches or fixes are available for this vulnerability. Users should monitor the vendor's advisory channels for updates. As a temporary mitigation, restricting network access to the /mcp_message endpoint by implementing external network controls such as firewall rules or VPN access may reduce exposure. Avoid exposing the nginx-ui interface to untrusted networks until a patch is released.
Description
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.