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CVE-2026-43999

CRITICAL CVSS: 9.9 Published: 2026-05-13 Modified: 2026-08-06

Description

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 Platforms

Vm2 Project Vm2

Weakness Type

CWE-863, CWE-829

References