CVE-2026-43999
CRITICALvm2: NodeVM builtin allowlist bypass via `module` builtin's `Module._load` allows sandbox escape
Title source: cnaDescription
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.
References (1)
Core 1
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8
Scores
CVSS v3
9.9
EPSS
0.0018
EPSS Percentile
39.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-863
Status
published
Products (3)
npm/vm2
3.10.5 - 3.11.0npm
patriksimek/vm2
< 3.11.0
vm2_project/vm2
< 3.11.0
Published
May 13, 2026
Tracked Since
May 13, 2026