{"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","slug":"CVE-2026-79538","body":"## Overview\n\nmetatool-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).\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":213132,"id":"CVE-2026-79538","ts":1790714845295,"field":"cvss","old":null,"new":"9.8"},{"seq":213131,"id":"CVE-2026-79538","ts":1790714845295,"field":"severity","old":"none","new":"critical"}]}