Sandbox Escape Vulnerability in vm2 for Node.js
CVE-2026-43997

10CRITICAL

Key Information:

Vendor

Patriksimek

Status
Vm2
Vendor
CVE Published:
13 May 2026

What is CVE-2026-43997?

The vm2 is an open-source virtual machine (VM)/sandbox environment for Node.js applications. A vulnerability has been identified in versions prior to 3.11.0 that allows attackers to potentially escape the sandbox by accessing the host Object. This can occur through various methods, such as leveraging HostObject.getOwnPropertySymbols to retrieve Symbol(nodejs.util.inspect.custom). The vulnerability has been addressed and mitigated in version 3.11.0.

Affected Version(s)

vm2 < 3.11.0

References

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

CVSS V3.1

Score:
10
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.