{"id":"CVE-2021-42740","details":"The shell-quote package before 1.7.3 for Node.js allows command injection. An attacker can inject unescaped shell metacharacters through a regex designed to support Windows drive letters. If the output of this package is passed to a real shell as a quoted argument to a command with exec(), an attacker can inject arbitrary commands. This is because the Windows drive letter regex character class is {A-z] instead of the correct {A-Za-z]. Several shell metacharacters exist in the space between capital letter Z and lower case letter a, such as the backtick character.","aliases":["GHSA-g4rg-993r-mgx7"],"modified":"2026-03-13T05:15:26.400843Z","published":"2021-10-21T15:15:07.633Z","related":["CGA-rh74-4xrc-3rv6","SUSE-SU-2022:3313-1","SUSE-SU-2022:3314-1","SUSE-SU-2022:3761-1","SUSE-SU-2023:0592-1"],"references":[{"type":"ADVISORY","url":"https://github.com/substack/node-shell-quote/blob/master/CHANGELOG.md#173"},{"type":"ADVISORY","url":"https://www.npmjs.com/package/shell-quote"},{"type":"FIX","url":"https://github.com/substack/node-shell-quote/commit/5799416ed454aa4ec9afafc895b4e31760ea1abe"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"1.7.3"}]}],"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-42740.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}