CVE-2026-43999: VM2 Project VM2

Critical severity, CVSS 9.9. EPSS: 1% chance of exploitation in the next 30 days.

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 products

• VM2 Project VM2: before 3.11.0 (fixed in 3.11.0)

Published 2026-05-13. Last modified 2026-09-07.