VULNERABILITY INTELLIGENCE

CVE-2026-43999

CVSS score9.9 CRITICAL
EPSS probability0.97%
CISA KEVNot currently listed
Published2026-05-13
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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.

Weakness classification

  • security-advisories@github.com: CWE-863
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-829

Primary references