{"schema":"threatline.record/2","record":{"id":"CVE-2026-55157","aliases":["GHSA-49mq-fc6q-3h46"],"summary":"Token Optimizer MCP: OS command injection in smart_user via username in get-user-info","details":"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.","categories":["Libraries & packages"],"product":"token-optimizer-mcp","vendor":"ooples","ecosystem":"npm","affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-55157","source_modified_at":"2026-10-01T14:47:57.868Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"token-optimizer-mcp","vendor":"ooples","versions":[{"version":"< 5.1.0","status":"affected"}],"defaultStatus":null},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-49mq-fc6q-3h46","source_modified_at":"2026-08-14T21:56:05.559576Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"@ooples/token-optimizer-mcp","ecosystem":"npm","purl":"pkg:npm/%40ooples/token-optimizer-mcp"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.1.0"}]}],"versions":[]}],"fixed_versions":[{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-49mq-fc6q-3h46","source_modified_at":"2026-08-14T21:56:05.559576Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"@ooples/token-optimizer-mcp","ecosystem":"npm","purl":"pkg:npm/%40ooples/token-optimizer-mcp"},"version":"5.1.0"}],"cvss":8.4,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00705,"percentile":0.52819,"score_date":"2026-10-23"},"published_at":"2026-09-28T17:48:16.422Z","modified_at":"2026-10-01T14:47:57.868Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-55157","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-01T14:47:57.868Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-49mq-fc6q-3h46","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-08-14T21:56:05.559576Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-55157","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/ooples/token-optimizer-mcp/security/advisories/GHSA-49mq-fc6q-3h46","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/ooples/token-optimizer-mcp/commit/b4ee96dac799cbfba0a9f9c17844ce9d613cbcc7","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/ooples/token-optimizer-mcp/releases/tag/v5.1.0","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"total","assessed_at":"2026-10-01T14:47:18.746481Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-01T14:47:57.868Z","content_hash":"0bb05b5be807c19d2a36e691c84cbf2d5bc7c6221d8b052bec62c8bca8bf32c0"}}