CVE-2026-43999
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.
SeverityCritical
CVSS9.9
Exploit probability62. percentile1%
ProductVm2
PublishedMay 13, 2026
First seenMay 13, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- vm2_project vm23.11.0 or later
- vm23.11.0 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vm2_project vm2 | v < 3.11.0 | 3.11.0 |
| vm2npm | 3.10.5 ≤ v < 3.11.0 | 3.11.0 |
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