Vulnerabilities/

Sandbox Breakout / Arbitrary Code Execution in localeval

Severity:
High

Description

All versions of localeval are vulnerable to Sandbox Escape leading to Remote Code Execution. The package fails to restrict access to the main context through constructor.constructor. This may allow attackers to execute arbitrary code in the system. Evaluating the payload

returns the contents of process.env.

Recommendation

Update the localeval package to the latest compatible version. Followings are version details:

References

Related Issues

Tags:
npm
localeval
Anything's wrong? Let us know Last updated on January 16, 2026