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.

Project Subscriptions

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-6785-pvv7-mvg7 vm2 Sandbox Access to Host Buffer.alloc Allows timeout Bypass Resulting in Memory Exhaustion
Fixes

Solution

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Workaround

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History

Wed, 13 May 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 13 May 2026 18:00:00 +0000

Type Values Removed Values Added
Description 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.
Title vm2: Host Process OOM DoS via Buffer.alloc (Timeout Bypass)
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-13T18:19:28.423Z

Reserved: 2026-05-04T21:24:36.505Z

Link: CVE-2026-44004

cve-icon Vulnrichment

Updated: 2026-05-13T18:08:08.236Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-05-13T18:16:17.123

Modified: 2026-05-13T19:17:26.547

Link: CVE-2026-44004

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses