CVE-2026-84319 Nginx UI - Command Injection

Nginx UI < 2.4.1 contains a command injection caused by MCP configuration interface allowing secondary authenticated users to load restricted modules and execute attacker-controlled JavaScript, letting attackers execute code in Nginx worker context, exploit requires secondary user authentication.

CVSS base score 8.3 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.28% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Command Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Published
12 October 2026
Updated
15 October 2026
Weakness
CWE-693

Vendor fix

Update to version 2.4.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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