CVE-2026-79538

CRITICALCVSS 9.8

Description

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).

Timeline

Published:September 29th, 2026 8:17 PM

Last modified:September 29th, 2026 9:28 PM

CVSS Scoring

CVSS v3: 9.8 (CRITICAL)

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

Weaknesses (CWE)

CWE-94

References & Reports

Advisories, patches, and third-party reports

https://github.com/metatool-ai/metamcp
https://www.traceforce.ai/security-advisories/cve-2026-79538

Source: NIST NVD · Data may lag official sources by up to one minute