Symlink Attack Affecting shescape package, versions <2.1.9
Threat Intelligence
Exploit Maturity
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
Proof of Concept
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Test your applications- Snyk IDSNYK-JS-SHESCAPE-15440479
- published8 Mar 2026
- disclosed7 Mar 2026
- creditUnknown
Introduced: 7 Mar 2026
NewCVE-2026-30916 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade shescape to version 2.1.9 or higher.
Overview
shescape is a simple shell escape library
Affected versions of this package are vulnerable to Symlink Attack in resolving shells in unix.js. An attacker can expose sensitive information by configuring the shell path as a symbolic link to another symlink, which may bypass proper escaping in the second shell and lead to unintended command execution.