CVE-2026-79538

EUVD-2026-89360 · Published Sep 29, 2026 · 3w ago

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).

Weaknesses

CWE-94

CVSS scores

v3.19.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

MITRE ATT&CK

Inferred

Where this vulnerability fits in an attack

ReconImpact

Initial Access Stealth

T1190Exploit Public-Facing Application T1027.006HTML Smuggling T1027.009Embedded Payloads T1564.009Resource Forking

References

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

Potentially impacted assets

See if this affects your attack surface