{"id":"CVE-2026-108953","summary":"mac-shell-mcp before 2.0.0 OS Command Injection via execute_command Arguments","details":"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.","modified":"2026-10-15T02:30:59.716479622Z","published":"2026-10-12T12:13:05.422Z","database_specific":{"cwe_ids":["CWE-78"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108953.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"fixed":"2.0.0"}]},{"source":"DESCRIPTION","extracted_events":[{"fixed":"2.0.0"}]}],"cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108953.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-108953"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/mac-shell-mcp-before-2.0.0-os-command-injection-via-execute-command-arguments"},{"type":"REPORT","url":"https://github.com/cfdude/mac-shell-mcp/issues/45"},{"type":"FIX","url":"https://github.com/cfdude/mac-shell-mcp/commit/932ce733cde07bb30b1f186303e6692dbb5d087a"},{"type":"PACKAGE","url":"https://github.com/cfdude/mac-shell-mcp"},{"type":"ARTICLE","url":"https://github.com/cfdude/mac-shell-mcp/blob/1c1708201abb7a18c83075e1bf933e7a92cbeb9f/src/services/command-service.ts#L257-L340"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/cfdude/mac-shell-mcp","events":[{"introduced":"0"},{"fixed":"932ce733cde07bb30b1f186303e6692dbb5d087a"}],"database_specific":{"source":"REFERENCES"}}],"versions":["v1.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-108953.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}