---
id: CVE-2026-79538
title: >-
  metatool-ai MetaMCP up to and including 2.4.22 is vulnerable to Code Execution
  in the internal MCP inspector proxy endpoint GET /mcp-proxy/server/stdio
  (createTransport, STDIO branch, routers/mcp-proxy/server.ts).
summary: >-
  metatool-ai MetaMCP up to and including 2.4.22 is vulnerable to Code Execution
  in the internal MCP inspector proxy endpoint GET /mcp-proxy/server/stdio
  (createTransport, STDIO branch, routers/mcp-proxy/server.ts).
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-94
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T21:28:02.477'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-79538'
references:
  - url: 'https://github.com/metatool-ai/metamcp'
    label: cve@mitre.org
  - url: 'https://www.traceforce.ai/security-advisories/cve-2026-79538'
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-29T20:30:41.551469Z'
ingestedAt: '2026-09-29T19:44:04.159Z'
---

## Overview

metatool-ai MetaMCP up to and including 2.4.22 is vulnerable to Code Execution in the internal MCP inspector proxy endpoint GET /mcp-proxy/server/stdio (createTransport, STDIO branch, routers/mcp-proxy/server.ts).

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.