{"id":"CVE-2026-108953","revision":"1424f6ab92594ae183457fe287553ad7","records":[{"revision":"1424f6ab92594ae183457fe287553ad7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-108953","aliases":[],"title":"mac-shell-mcp before 2.0.0 OS Command Injection via execute_command Arguments","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.","state":0,"publishedAt":"2026-10-12T12:13:05.422+00:00","modifiedAt":"2026-10-13T16:58:27.456+00:00","affected":[{"ecosystem":"Vendor product","name":"mac-shell-mcp","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"cfdude\",\n                    \"product\": \"mac-shell-mcp\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"2.0.0\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.5,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://github.com/cfdude/mac-shell-mcp/issues/45","https://github.com/cfdude/mac-shell-mcp/commit/932ce733cde07bb30b1f186303e6692dbb5d087a","https://github.com/cfdude/mac-shell-mcp/blob/1c1708201abb7a18c83075e1bf933e7a92cbeb9f/src/services/command-service.ts#L257-L340","https://github.com/cfdude/mac-shell-mcp","https://www.vulncheck.com/advisories/mac-shell-mcp-before-2.0.0-os-command-injection-via-execute-command-arguments"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-108953","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-108953","identifiers":["CVE-2026-108953"]},"retained":false,"historicalAffected":[]}],"coverage":[]}