GitHub Advisoryadvisory · npm
GHSA-mmqv-m45h-q2hp Sandbox Breakout / Arbitrary Code Execution in localeval
CRITICAL
Official page ↗
- Ecosystem
- npm
- Packages
- localeval
- Severity
- Critical
- Reviewed
- 2020-08-31
Affected packages
• npm localeval: < 15.3.0 → fixed in 15.3.0
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
```
constructor.constructor("return process.env")()
```
returns the contents of `process.env`.
Recommendation
No fix is currently available. Consider using an alternative package until a fix is made available.