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Vulnerability record · CVE-2026-43999 · published 13 May 2026

CVE-2026-43999: Vm2 project vm2 incorrect authorization vulnerability

Vm2 Project · Vm2

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.

9.9 CVSS 3.1 Critical EPSS 0.97% · top 39.6% CWE-863 · Incorrect authorizationCWE-829 · Inclusion from untrusted sphere
9.9CVSS 3.1 base score
0.97%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
7 Sep 2026Last modified by NVD

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-43999), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.