GitHub Advisoryadvisory · npm

GHSA-gc25-3vc5-2jf9 Sandbox Breakout / Arbitrary Code Execution in sandbox

CRITICAL Published 2020-09-04 Modified 2026-02-02 Official page ↗
Ecosystem
npm
Packages
sandbox
Severity
Critical
Reviewed
2020-08-31

Affected packages

• npm sandbox: < 1.0.0 (no fix yet)

Description

All versions of `sandbox` are vulnerable to Sandbox Escape leading to Remote Code Execution. The package fails to restrict access to the main context through `this.constructor.constructor` . This may allow attackers to execute arbitrary code in the system. Evaluating the payload `this.constructor.constructor('return process.env')()` prints the contents of `process.env`. Recommendation No fix is currently available. Consider using an alternative package until a fix is made available.

References