Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vm2 Project | Vm2 | < 3.11.0 |
Related Weaknesses (CWE)
References
- https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8ExploitMitigationVendor Advisory
- https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8ExploitMitigationVendor Advisory
FAQ
What is CVE-2026-43999?
CVE-2026-43999 is a vulnerability with a CVSS score of 9.9 (CRITICAL). 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 expose...
How severe is CVE-2026-43999?
CVE-2026-43999 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-43999?
Check the references section above for vendor advisories and patch information. Affected products include: Vm2 Project Vm2.