Memory Allocation Vulnerability in vm2 for Node.js
CVE-2026-44004

7.5HIGH

Key Information:

Vendor

Patriksimek

Status
Vm2
Vendor
CVE Published:
13 May 2026

What is CVE-2026-44004?

The vm2 library, used for sandboxing Node.js applications, has a vulnerability that allows arbitrary memory allocation through Buffer.alloc() prior to version 3.11.0. This issue arises because the Buffer.alloc() function is a synchronous native call, which inhibits the timeout feature of vm2 from interrupting the process. Consequently, an exploit can lead to exhaustion of the host memory, potentially causing a crash with a fatal error due to reaching the heap limit. This vulnerability has been fixed 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:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.