CVE-2026-79538

Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days.

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).

Published 2026-09-29. Last modified 2026-09-29.