CVE-2026-55157: Ooples Token-Optimizer-Mcp

High severity, CVSS 8.4. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Ooples Token-Optimizer-Mcp: before 5.1.0 (fixed in 5.1.0)

Published 2026-09-28. Last modified 2026-10-01.