Vulnerability library
Security checkJanuary 09, 2023

Sandbox Breakout in realms-shim - realms-shim

Understand the exposure, see the recommended fix, and check whether your own website has related weaknesses.

High severitynpmrealms-shim

Check your website

Find this and other vulnerabilities with a free scan.

Your scan runs on your computer. No account required.

Description

Versions of realms-shim prior to 1.2.0 are vulnerable to a Sandbox Breakout. Reflect.construct can be used on the sandboxed Function constructor to reach the prototypes of the primal Realm, which may allow an attacker to escape the sandbox and execute arbitrary code.

Recommendation

Update the realms-shim package to the latest compatible version. Followings are version details:

  • Affected version(s): < 1.2.0
  • Patched version(s): 1.2.0

References

Could your website be exposed too?

SmartScanner can check your website for Sandbox Breakout in realms-shim - realms-shim and gives you actionable findings to investigate.

Start a free scan

Related Issues

You might also like:

How to Secure your NodeJs Express Javascript Application - part 1

How to Secure your NodeJs Express Javascript Application - part 2

10 Secure Coding Best Practices to Follow in Every Project

See something that needs correcting? Let us knowUpdated January 09, 2023