GitHub Advisoryadvisory · npm

GHSA-g4rg-993r-mgx7 Improper Neutralization of Special Elements used in a Command in Shell-quote

CRITICAL Published 2022-05-24 Modified 2025-09-10 Official page ↗
Aliases
CVE-2021-42740
Ecosystem
npm
Packages
shell-quote
Severity
Critical
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-77
Reviewed
2022-06-21

Affected packages

• npm shell-quote: >= 1.6.3, < 1.7.3 → fixed in 1.7.3

Description

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.

Related

Alias · CVE (1)

  • CVE-2021-42740 The shell-quote package before 1.7.3 for Node.js allows command injection. vulnerability

Weakness · CWE (1)

  • CWE-77 Improper Neutralization of Special Elements used in a Command weakness

References