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vm2 sandbox could allow attackers to compromise the host system

The vm2 sandbox library used in Node.js applications could allow attackers to escape security controls and execute commands on the host system. This could potentially compromise critical operational systems and expose sensitive files.

NVD published May 13, 2026 (2 days ago)

External risk briefCRITICAL

CVE-2026-44008

Halo Surface Signal

3/ 5

The vulnerability resides in a software library, not a standalone service. Its exposure is entirely dependent on the specific implementation of the host application. While it is frequently used to isolate untrusted code in web applications, it can also be used for internal tooling, meaning public internet reachability is possible but not an inherent or default characteristic of the product itself.

Exposure facts

H – Horizon Alert

A security vulnerability has been identified in the vm2 sandbox software for Node.js. The issue allows untrusted code to bypass security controls by improperly accessing sensitive internal objects that should remain isolated. If exploited, an attacker could escape the sandbox environment and execute unauthorized commands on the underlying host system, posing a significant risk to the integrity and security of the server.

A – Asset Exposure

This issue affects the `vm2` sandbox library, which is integrated into Node.js applications to isolate untrusted code. Because this technology is embedded within custom software, its exposure depends entirely on how an organization utilizes it, ranging from public-facing code execution platforms to internal tooling. If compromised, unauthorized code could escape the sandbox, potentially allowing for arbitrary command execution on the underlying host system. This could lead to a compromise of critical operational systems and unauthorized access to sensitive files hosted on the server.

L – Live Threat

The available information regarding this sandbox escape vulnerability in the Node.js environment does not indicate active exploitation or specific observed targeting at this time. Currently, there is no evidence of public exploit code or widespread malicious activity associated with this issue. Therefore, the immediate risk signals for this vulnerability remain limited.

O – Operational Fix

To address the identified security gap in the Node.js sandbox environment, please ensure your development teams apply the latest available update provided by the vendor. This release resolves the underlying issue that allowed unauthorized access to the host system, effectively securing the environment. If an immediate update is not feasible, prioritize validating your current system configuration and continue following official vendor guidance.

References