CVE-2026-44004 HIGH

CVE-2026-44004: vm2: Host Process OOM DoS via Buffer.alloc (Timeout Bypass)

Vendor Patriksimek
Product vm2
Weakness CWE-770 · Uncontrolled resource consumption
Published May 13, 2026
Last update June 30, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, sandboxed code can call Buffer.alloc() with an arbitrary size to allocate memory directly on the host heap. Because Buffer.alloc is a synchronous C++ native call, vm2's timeout option cannot interrupt it. A single request can exhaust host memory and crash the process with a FATAL ERROR: Reached heap limit. This vulnerability is fixed in 3.11.0.

Key dates

02Disclosure timeline

May 13, 2026 CVE published
June 30, 2026 Record updated