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Vulnerability · Published May 13, 2026 · Assigned by GitHub_M

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

High 7.5

In plain English

A high-severity resource allocation without limits in vm2 from patriksimek. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 63.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
npmvm23.11.0GHSA-6785-pvv7-mvg7

Affected products (as reported)

VendorProductVersions
patriksimek vm2 < 3.11.0

Weakness: CWE-770, CWE-1285 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References