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CVE-2023-37903

CriticalPublished

Sandbox Escape in vm2

Published: Jul 21, 2023
Updated: Nov 3, 2025
Assigning CNA: GitHub_M
Evidence observed: Aug 8, 2026

Primary CVSS

10.0/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS probability estimate

4.2%

Low · next 30 days

Percentile: 90.6%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

vm2 is an open source vm/sandbox for Node.js. In vm2 for versions up to and including 3.9.19, Node.js custom inspect function allows attackers to escape the sandbox and run arbitrary code. This may result in Remote Code Execution, assuming the attacker has arbitrary code execution primitive inside the context of vm2 sandbox. There are no patches and no known workarounds. Users are advised to find an alternative software.

Sources

CVE-2023-37903Exploit
Standalone proof-of-concept exploit for CVE-2023-37903 that triggers the targeted vulnerability and establishes a reverse shell.

Responsible use

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