Description
mac-shell-mcp before 2.0.0 contains an OS command injection vulnerability that allows MCP clients to bypass the command whitelist by injecting shell metacharacters into execute_command arguments. Attackers or malicious prompts can call a safe command such as pwd with arguments like ';' to run forbidden commands as the server user without approval.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| cfdude | mac-shell-mcp | < 2.0.0 | 2.0.0 |
References
- https://github.com/cfdude/mac-shell-mcp/issues/45 issue-tracking
- https://github.com/cfdude/mac-shell-mcp/commit/932ce733cde07bb30b1f186303e6692dbb5d087a patch
- https://github.com/cfdude/mac-shell-mcp/blob/1c1708201abb7a18c83075e1bf933e7a92cbeb9f/src/services/command-service.ts#L257-L340 technical-description
- https://github.com/cfdude/mac-shell-mcp product
- VulnCheck Advisory: mac-shell-mcp before 2.0.0 OS Command Injection via execute_command Arguments third-party-advisory