Improper Encoding or Escaping of Output Affecting shescape package, versions <2.1.14>=3.0.0 <3.0.1
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Test your applications- Snyk IDSNYK-JS-SHESCAPE-18319527
- published26 Jul 2026
- disclosed24 Jul 2026
- creditUnknown
Introduced: 24 Jul 2026
New CVE NOT AVAILABLE CWE-116 (opens in a new tab)How to fix?
Upgrade shescape to version 2.1.14, 3.0.1 or higher.
Overview
shescape is a simple shell escape library
Affected versions of this package are vulnerable to Improper Encoding or Escaping of Output in the escape or escapeAll process when used with the shell option set to Dash or when the default shell is Dash. An attacker can obtain the user's home directory and potentially influence the location on which a command operates by supplying specially crafted input containing ~ characters. This is only exploitable if the application explicitly configures the shell option to Dash or relies on Dash as the default shell in assignment contexts.
Workaround
This vulnerability can be mitigated by refraining from using Dash, using the env option of the node:child_process API to inject variables with untrusted values, or removing all instances of ~ from untrusted inputs.