CVE-2026-55157
Token Optimizer MCP: OS command injection in smart_user via username in get-user-info
CVSS Score
8.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-78 |
| Vendor | ooples |
| Product | token-optimizer-mcp |
| Published | Sep 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
ooples / token-optimizer-mcp
< 5.1.0