What is GHSA-gc25-3vc5-2jf9?

GHSA-gc25-3vc5-2jf9 is a security advisory published by GitHub Security Advisories with Critical severity. Sandbox Breakout / Arbitrary Code Execution in sandbox

Why does GHSA-gc25-3vc5-2jf9 have no CVE ID yet?

GitHub Security Advisories published this advisory directly to customers before NVD assigned a CVE ID. This is the embargo-window disclosure pattern — vendors notify customers on day 0; NVD's public record follows days to weeks later.

Which products are affected by GHSA-gc25-3vc5-2jf9?

GHSA-gc25-3vc5-2jf9 affects 1 product, including: npm/sandbox:\u003e= 0.0.0, \u003c 1.0.0.

GHSA-gc25-3vc5-2jf9CriticalDisclosed before NVD

Sandbox Breakout / Arbitrary Code Execution in sandbox

Vendor

GitHub Security Advisories

Published

September 4, 2020

Last Modified

February 2, 2026

📋 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.

🎯 Affected products1

npm/sandbox:>= 0.0.0, < 1.0.0

🔗 References (2)

https://www.npmjs.com/advisories/1318
https://github.com/advisories/GHSA-gc25-3vc5-2jf9