CVE-2026-44004
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductVm2
PublishedMay 13, 2026
First seenMay 13, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- vm2_project vm23.11.0 or later
- vm23.11.0 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vm2_project vm2 | v < 3.11.0 | 3.11.0 |
| vm2npm | v < 3.11.0 | 3.11.0 |
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