CVE-2026-44004 — vm2: Host Process OOM DoS via Buffer.alloc (Timeout Bypass)
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. Becaus…
Published: 2026-05-13 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7