{"id":"CVE-2026-55157","published":"2026-09-28T18:17:23.373","lastModified":"2026-09-28T18:17:23.373","description":"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.","cvssScore":8.4,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-78"],"vendors":[],"products":[],"references":[{"url":"https://github.com/ooples/token-optimizer-mcp/commit/b4ee96dac799cbfba0a9f9c17844ce9d613cbcc7","tags":[]},{"url":"https://github.com/ooples/token-optimizer-mcp/releases/tag/v5.1.0","tags":[]},{"url":"https://github.com/ooples/token-optimizer-mcp/security/advisories/GHSA-49mq-fc6q-3h46","tags":[]}],"exploitRefs":[{"url":"https://github.com/ooples/token-optimizer-mcp/commit/b4ee96dac799cbfba0a9f9c17844ce9d613cbcc7","tags":[]},{"url":"https://github.com/ooples/token-optimizer-mcp/releases/tag/v5.1.0","tags":[]},{"url":"https://github.com/ooples/token-optimizer-mcp/security/advisories/GHSA-49mq-fc6q-3h46","tags":[]}],"hasPoc":true,"ai":null}