{"id":"CVE-2026-43999","title":"vm2 is an open source vm/sandbox for Node.js","summary":"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 …","severity":"critical","cvss":9.9,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-863","CWE-829"],"vendor":"vm2_project","product":"vm2","affected":["vm2 < 3.11.0"],"patched":["vm2 3.11.0"],"published":"2026-05-13","updated":"2026-08-06","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-43999","references":[{"url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8","label":"security-advisories@github.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:50850","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-43999","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2477196","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43999.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}],"tags":["nvd"],"epss":0.00974,"epssPercentile":0.60048,"ingestedAt":"2026-08-06T13:59:37.737Z","slug":"CVE-2026-43999","body":"## Overview\n\nvm2 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.\n\n## Affected\n\n- `vm2 < 3.11.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `vm2 3.11.0`","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":54.5,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}