{"id":"CVE-2026-79538","aliases":["EUVD-2026-89360","GHSA-4qvr-m43m-5qgr"],"status":"published","title":"metatool-ai MetaMCP up to and including 2.4.22 is vulnerable to Code Execution in the internal...","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).","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00435,"percentile":0.38254,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-94"],"published":"2026-09-29T00:00:00Z","modified":"2026-10-28T02:30:36Z","references":[{"url":"https://github.com/metatool-ai/metamcp","tags":["package"]},{"url":"https://www.traceforce.ai/security-advisories/cve-2026-79538","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-79538","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4qvr-m43m-5qgr"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79538.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-79538","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).","status":"published","published":"2026-09-29T00:00:00Z","modified":"2026-09-29T20:31:12.917Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T13:50:27.582139Z"}],"euvd":[{"id":"EUVD-2026-89360","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).","status":"published","published":"2026-09-29T00:00:00Z","modified":"2026-09-29T20:31:12Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T17:27:51.078545Z"}],"ghsa":[{"id":"GHSA-4qvr-m43m-5qgr","title":"metatool-ai MetaMCP up to and including 2.4.22 is vulnerable to Code Execution in the internal...","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).","status":"published","published":"2026-09-29T21:33:26Z","modified":"2026-09-29T21:33:27Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T15:12:34.453857Z"}],"nvd":[{"id":"CVE-2026-79538","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).","status":"published","published":"2026-09-29T20:17:27.51Z","modified":"2026-09-29T21:28:02.477Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:12:52.759595Z"}],"osv":[{"id":"CVE-2026-79538","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).","status":"published","published":"2026-09-29T00:00:00Z","modified":"2026-10-28T02:30:36.785633226Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:17.44708Z"}]}}