CVE-2026-43999

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.

Score

CVSS 3.1 9.9 Critical

Status

Modified - security-advisories@github.com

Published

2026-05-13

Last modified

2026-10-26

Weaknesses

CWE-829, CWE-863

Affected products

• Vm2 (Patriksimek)
• Ansible Portal (Redhat)
• Rhdh (Redhat)
• Vm2 (Vm2 Project)

References

• https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8
• https://access.redhat.com/security/cve/CVE-2026-43999
• https://bugzilla.redhat.com/show_bug.cgi?id=2477196
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43999.json
• https://access.redhat.com/errata/RHSA-2026:50850