CVE WatchJul 15, 2026

CVE-2026-43999

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

CVSS

9.9

Critical

EPSS

1.0%

p58

KEV

—

Exploit Today

0-100

Published: May 13, 2026 · Last modified: Jul 15, 2026 · CWE-863 · CWE-829

EPSS · 30d

1.0%EPSS · 30 days1.0%

2026-06-302026-07-16

Technical 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.

Official references

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