CVE-2026-108953
mac-shell-mcp before 2.0.0 contains an OS command injection vulnerability that allows MCP clients…
- Risk score
- 58/100
- CVSS
- 7.8 v3.1
- Exploit chance (30 days)
- 0.7%
- Published
- 12 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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…
- Affected
- See advisory
- Fix
- Upgrade the product to 2.0.0 or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 7.8 high
References
- https://github.com/cfdude/mac-shell-mcp
- https://github.com/cfdude/mac-shell-mcp/blob/1c1708201abb7a18c83075e1bf933e7a92cbeb9f/src/services/command-service.ts#L257-L340
- https://github.com/cfdude/mac-shell-mcp/commit/932ce733cde07bb30b1f186303e6692dbb5d087a
- https://github.com/cfdude/mac-shell-mcp/issues/45
- https://www.vulncheck.com/advisories/mac-shell-mcp-before-2.0.0-os-command-injection-via-execute-command-arguments
Original 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.
Last activity 12 Oct 2026. Patch Forecast updates every hour.