Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vm2 Project | Vm2 | < 3.11.0 |
Related Weaknesses (CWE)
References
- https://github.com/patriksimek/vm2/security/advisories/GHSA-6785-pvv7-mvg7ExploitVendor Advisory
- https://github.com/patriksimek/vm2/security/advisories/GHSA-6785-pvv7-mvg7ExploitVendor Advisory
FAQ
What is CVE-2026-44004?
CVE-2026-44004 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 syn...
How severe is CVE-2026-44004?
CVE-2026-44004 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44004?
Check the references section above for vendor advisories and patch information. Affected products include: Vm2 Project Vm2.