---
title: "CVE-2026-84317: Nginx UI - Command Injection"
description: "Nginx UI < 2.4.1 contains a command injection caused by lack of validation in MCP tool nginx_config_add allowing authenticated MCP callers to inject dangerous directives, letting attackers execute code via njs/perl modules."
url: https://panop.io/threat-heartbeat/CVE-2026-84317/
---

# CVE-2026-84317 Nginx UI - Command Injection

Nginx UI < 2.4.1 contains a command injection caused by lack of validation in MCP tool nginx\_config\_add allowing authenticated MCP callers to inject dangerous directives, letting attackers execute code via njs/perl modules.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.38% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-84317)

## Details

Type

Command Injection

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

12 October 2026

Updated

15 October 2026

Weakness

[CWE-20](https://cwe.mitre.org/data/definitions/20.html)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-84317](https://nvd.nist.gov/vuln/detail/CVE-2026-84317)
- [https://github.com/0xJacky/nginx-ui/commit/23d1934099b05b2a01589b48129dc3d3159d91c2](https://github.com/0xJacky/nginx-ui/commit/23d1934099b05b2a01589b48129dc3d3159d91c2)
- [https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.1](https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.1)
- [https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-76pm-mq2q-9gcr](https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-76pm-mq2q-9gcr)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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