Bypass in vm2 Sandbox Component for Node.js Affects Multiple Versions
CVE-2026-43999

9.9CRITICAL

Key Information:

Vendor

Patriksimek

Status
Vm2
Vendor
CVE Published:
13 May 2026

What is CVE-2026-43999?

The vm2 library, an open-source sandboxing tool for Node.js, contains a vulnerability in versions before 3.11.0. This issue allows an attacker to bypass the built-in allowlist, particularly when the built-in module is permitted. By leveraging this shortcut, malicious users can access unrestricted Node.js modules such as child_process, leading to potential remote code execution. This vulnerability demonstrates significant risks, especially in environments where code is run in a sandbox, making it crucial for users to upgrade to version 3.11.0 or later to ensure their systems are secure.

Affected Version(s)

vm2 < 3.11.0

References

https://github.com/patriksimek/vm2/security/advisories/GH...
x_refsource_CONFIRM

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.