CVE-2026-108953
mac-shell-mcp before 2.0.0 OS Command Injection via execute_command Arguments
cfdude mac-shell-mcp
CVSS
8.5HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.75%Chance of exploitation activity in the next 30 days, higher than 54% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 2.0.0mac-shell-mcpCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
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.
Text from CVE List
Affected versions 1
- mac-shell-mcpaffected: all versions before 2.0.0CVE List
References 5
- github.com/cfdude/mac-shell-mcp/commit/932ce733cde07bb30b1f186303e6692dbb5d087aFixvia CVE List
- vulncheck.com/advisories/mac-shell-mcp-before-2.0.0-os-command-injection-via-execute-command-argumentsAdvisoryvia CVE List
- github.com/cfdude/mac-shell-mcp/issues/45Referencevia CVE List
- github.com/cfdude/mac-shell-mcp/blob/1c1708201abb7a18c83075e1bf933e7a92cbeb9f/src/services/command-service.ts#L257-L340Referencevia CVE List
- github.com/cfdude/mac-shell-mcpReferencevia CVE List