CVE-2026-43999

CriticalCVSS 9.9/10Last modified Sep 7, 2026

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.

Metrics

CVSS 3.1 9.9/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-863CWE-829

Affected software

No affected versions have been published.

Timeline

Published
May 13, 2026
Last modified
Sep 7, 2026
NVD status
Modified

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CVE-2026-43999: Critical severity, CVSS 9.9 | Vulnix