vm2 Sandbox Escape (CVE-2026-44006) Poses Critical Threat to Node.js
A critical vulnerability, CVE-2026-44006, has been identified in vm2, an open-source sandbox for Node.js environments. The National Vulnerability Database reports this flaw, prior to version 3.11.0, allows an attacker to achieve arbitrary prototype access by reaching BaseHandler.getPrototypeOf. This effectively enables a sandbox escape, granting an attacker control outside the intended isolated environment.
The severity of this issue cannot be overstated. With a CVSS score of 10.0 (CRITICAL), this vulnerability presents a direct path to full system compromise if exploited. The attack vector is network-based, requires no privileges or user interaction, and impacts confidentiality, integrity, and availability completely. Any application relying on vm2 for secure code execution is at severe risk.
Defenders must prioritize patching immediately. Given the ease of exploitation and the critical impact, any delay leaves systems wide open. The attacker’s calculus here is simple: find vulnerable Node.js applications using vm2, bypass the sandbox, and own the underlying system. This is a prime target for initial access brokers and sophisticated threat actors.
What This Means For You
- If your organization utilizes vm2 in any Node.js application for sandboxing untrusted code, you must upgrade to version 3.11.0 or later immediately. Prioritize this patch. Any delay leaves a critical sandbox escape vulnerability exposed, which can lead to complete system compromise.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
vm2 Sandbox Escape via BaseHandler.getPrototypeOf - CVE-2026-44006
title: vm2 Sandbox Escape via BaseHandler.getPrototypeOf - CVE-2026-44006
id: scw-2026-05-13-ai-1
status: experimental
level: critical
description: |
Detects the use of the vm2 library in Node.js with a known vulnerable pattern that allows for sandbox escape via BaseHandler.getPrototypeOf. This is a critical vulnerability (CVSS 10) that can lead to arbitrary code execution.
author: SCW Feed Engine (AI-generated)
date: 2026-05-13
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-44006/
tags:
- attack.execution
- attack.t1059.006
logsource:
category: process_creation
detection:
selection:
Image|endswith:
- 'node.exe'
CommandLine|contains:
- 'require("vm2").VM'
- 'BaseHandler.getPrototypeOf'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-44006 | Privilege Escalation | vm2 Node.js sandbox prior to version 3.11.0 |
| CVE-2026-44006 | Information Disclosure | vm2 Node.js sandbox prior to version 3.11.0 |
| CVE-2026-44006 | Auth Bypass | vm2 Node.js sandbox vulnerable component: BaseHandler.getPrototypeOf |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 13, 2026 at 21:16 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
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