{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55157","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-16T15:13:28.165Z","datePublished":"2026-09-28T17:48:16.422Z","dateUpdated":"2026-10-01T14:47:57.868Z"},"containers":{"cna":{"title":"Token Optimizer MCP: OS command injection in smart_user via username in get-user-info","problemTypes":[{"descriptions":[{"cweId":"CWE-78","lang":"en","description":"CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":8.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/ooples/token-optimizer-mcp/security/advisories/GHSA-49mq-fc6q-3h46","tags":["x_refsource_CONFIRM"],"url":"https://github.com/ooples/token-optimizer-mcp/security/advisories/GHSA-49mq-fc6q-3h46"},{"name":"https://github.com/ooples/token-optimizer-mcp/commit/b4ee96dac799cbfba0a9f9c17844ce9d613cbcc7","tags":["x_refsource_MISC"],"url":"https://github.com/ooples/token-optimizer-mcp/commit/b4ee96dac799cbfba0a9f9c17844ce9d613cbcc7"},{"name":"https://github.com/ooples/token-optimizer-mcp/releases/tag/v5.1.0","tags":["x_refsource_MISC"],"url":"https://github.com/ooples/token-optimizer-mcp/releases/tag/v5.1.0"}],"affected":[{"vendor":"ooples","product":"token-optimizer-mcp","versions":[{"version":"< 5.1.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-28T17:48:16.422Z"},"descriptions":[{"lang":"en","value":"Token Optimizer MCP measures token savings per AI coding agent, optimizes context, and shares a live local knowledge graph across 16 CLI clients. Prior to version 5.1.0, token-optimizer-mcp is vulnerable to OS command injection in the smart_user tool. Any MCP client that can call the smart_user tool can execute arbitrary shell commands through the username argument of the get-user-info operation. The commands execute with the privileges of the user running the token-optimizer-mcp server. This issue has been patched in version 5.1.0."}],"source":{"advisory":"GHSA-49mq-fc6q-3h46","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/ooples/token-optimizer-mcp/security/advisories/GHSA-49mq-fc6q-3h46","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-01T14:47:18.746481Z","id":"CVE-2026-55157","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-01T14:47:57.868Z"}}]}}