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.
Metrics
CVSS 3.1 7.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| patriksimek | vm2 | < 3.11.0 |
| Red Hat | Red Hat Ansible Automation Platform 2.1 | — |
| Red Hat | Red Hat Developer Hub | — |
References
- https://github.com/patriksimek/vm2/security/advisories/GHSA-6785-pvv7-mvg7Exploit, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:50850
- https://access.redhat.com/security/cve/CVE-2026-44004
- https://bugzilla.redhat.com/show_bug.cgi?id=2477195
- https://github.com/patriksimek/vm2/security/advisories/GHSA-6785-pvv7-mvg7Exploit, Vendor Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44004.json
Timeline
- Published
- May 13, 2026
- Last modified
- Oct 26, 2026
- NVD status
- Modified