CVE-2026-55157
Token Optimizer MCP measures token savings per AI coding agent, optimizes context, and shares a…
- Risk score
- 61/100
- CVSS
- 8.4 v3.1
- Exploit chance (30 days)
- 0.7%
- Published
- 28 Sep 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 arbitr…
- Affected
- See advisory
- Fix
- Upgrade the product to 5.1.0 or later.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 8.4 high
References
- https://github.com/ooples/token-optimizer-mcp/commit/b4ee96dac799cbfba0a9f9c17844ce9d613cbcc7
- https://github.com/ooples/token-optimizer-mcp/releases/tag/v5.1.0
- https://github.com/ooples/token-optimizer-mcp/security/advisories/GHSA-49mq-fc6q-3h46
- https://github.com/ooples/token-optimizer-mcp/security/advisories/GHSA-49mq-fc6q-3h46
Original 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.
Last activity 28 Sep 2026. Patch Forecast updates every hour.