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Critical severity9.8NVD Advisory· Published Oct 21, 2021· Updated Jun 17, 2026

CVE-2021-42740

CVE-2021-42740

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
shell-quotenpm
>= 1.6.3, < 1.7.31.7.3

Affected products

61

Patches

Vulnerability mechanics

References

7

News mentions

0

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