---
id: CVE-2026-43999
title: vm2 is an open source vm/sandbox for Node.js
summary: >-
  vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, NodeVM's
  builtin allowlist can be bypassed when the module builtin is allowed
  (including via the '*' wildcard). The module builtin exposes Node's
  Module._load(), which loads …
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-863
  - CWE-829
vendor: vm2_project
product: vm2
affected:
  - vm2 < 3.11.0
patched:
  - vm2 3.11.0
published: '2026-05-13'
updated: '2026-08-06'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-43999'
references:
  - url: 'https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8'
    label: security-advisories@github.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:50850'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/security/cve/CVE-2026-43999'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2477196'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43999.json
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
tags:
  - nvd
epss: 0.0097
epssPercentile: 0.60296
ingestedAt: '2026-08-06T13:59:37.737Z'
---

## Overview

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, NodeVM's builtin allowlist can be bypassed when the module builtin is allowed (including via the '*' wildcard). The module builtin exposes Node's Module._load(), which loads any module by name directly in the host context, completely bypassing vm2's builtin restriction. This allows sandboxed code to load excluded builtins like child_process and achieve remote code execution. This vulnerability is fixed in 3.11.0.

## Affected

- `vm2 < 3.11.0`

## Remediation

Upgrade past the affected range:

- `vm2 3.11.0`