CVE-2026-44004

HIGH

vm2: Host Process OOM DoS via Buffer.alloc (Timeout Bypass)

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0005
EPSS Percentile 16.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (3)
npm/vm2 0 - 3.11.0npm
patriksimek/vm2 < 3.11.0
vm2_project/vm2 < 3.11.0
Published May 13, 2026
Tracked Since May 13, 2026