{"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": "2026-09-28T17:48:16.422Z"}, "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"}}}}

{}

{"affected": [{"affectedData": [{"product": "token-optimizer-mcp", "vendor": "ooples", "versions": [{"status": "affected", "version": "< 5.1.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-55157", "lastModified": "2026-09-28T18:17:23.373", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.5, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-28T18:17:23.373", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/ooples/token-optimizer-mcp/commit/b4ee96dac799cbfba0a9f9c17844ce9d613cbcc7"}, {"source": "security-advisories@github.com", "url": "https://github.com/ooples/token-optimizer-mcp/releases/tag/v5.1.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/ooples/token-optimizer-mcp/security/advisories/GHSA-49mq-fc6q-3h46"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-09-28T19:30:02.602828+00:00", "updated": "2026-09-28T19:30:02.602834+00:00", "vendors": []}