CVE-2026-43999 | vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.… | CVSS 9.9 CRITICAL

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.

Metadata

CVE ID: CVE-2026-43999
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-04 20:24 UTC
Published: 2026-05-13 17:21 UTC
Last updated: 2026-05-15 03:55 UTC
Primary CWE: CWE-863
CWE-863: Incorrect Authorization
Vendor / Product: patriksimek / vm2
Sources: cve.org · NVD

Severity & Metrics

9.9 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
patriksimek	vm2	—	< 3.11.0

Weakness (CWE)

CWE	Source	Description
CWE-863	cna	CWE-863: Incorrect Authorization

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.9	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References (1)

https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8 https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8