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Vulnerability details: VCID-x2zr-7eqd-m3b7
Vulnerability ID VCID-x2zr-7eqd-m3b7
Aliases CVE-2026-43999
GHSA-947f-4v7f-x2v8
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 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.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-863 Incorrect Authorization
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00178 https://api.first.org/data/v1/epss?cve=CVE-2026-43999
epss 0.00178 https://api.first.org/data/v1/epss?cve=CVE-2026-43999
epss 0.00178 https://api.first.org/data/v1/epss?cve=CVE-2026-43999
cvssv3.1_qr CRITICAL https://github.com/advisories/GHSA-947f-4v7f-x2v8
cvssv3.1 9.9 https://github.com/patriksimek/vm2
generic_textual CRITICAL https://github.com/patriksimek/vm2
cvssv3.1 9.9 https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8
cvssv3.1_qr CRITICAL https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8
generic_textual CRITICAL https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8
ssvc Track* https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8
cvssv3.1 9.9 https://nvd.nist.gov/vuln/detail/CVE-2026-43999
generic_textual CRITICAL https://nvd.nist.gov/vuln/detail/CVE-2026-43999
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-43999
https://github.com/patriksimek/vm2
https://nvd.nist.gov/vuln/detail/CVE-2026-43999
GHSA-947f-4v7f-x2v8 https://github.com/advisories/GHSA-947f-4v7f-x2v8
GHSA-947f-4v7f-x2v8 https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Found at https://github.com/patriksimek/vm2
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Found at https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2026-05-14T15:34:45Z/ Found at https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2026-43999
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.39192
EPSS Score 0.00178
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:41:17.376806+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/43xxx/CVE-2026-43999.json 38.6.0