Sandbox Breakout / Arbitrary Code Execution in safer-eval
Versions of safer-eval prior to 1.3.4 are vulnerable to Sandbox Escape leading to Remote Code Execution. A payload using constructor properties can escape the sandbox and execute arbitrary code. For example, evaluating he string console.constructor.constructor('return process')().env prints process.env to the console.
Recommendation
Upgrade to version 1.3.4 or later.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | safer-eval | < 1.3.4 | 1.3.4 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H- Weakness (CWE)
CWE-94- Platform
- npm
- Package
safer-eval- Disclosed
- 21.10.2019
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-r3x4-wr4h-pw33 - CC BY 4.0
Vulnerability history: safer-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
- 4
- First → latest
- 10.2019 09.2020
- Without a fix
- 2
- Exploited in attacks
- 0
Severity breakdown
- Critical 4
Disclosures per year
- 2019: 3
- 2020: 1
- 2021: 0
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
-
Sandbox Breakout / Arbitrary Code Execution in safer-eval this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.