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 products
vm2_project: vm2
References6
- github.com/patriksimek/vm2/security/advisories/GHSA-6785-pvv7-m… ExploitVendor Advisory
- github.com/patriksimek/vm2/security/advisories/GHSA-6785-pvv7-m… ExploitVendor Advisory
- access.redhat.com/errata/RHSA-2026:50850
- access.redhat.com/security/cve/CVE-2026-44004
- bugzilla.redhat.com/show_bug.cgi?id=2477195
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44004…
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 37 · as of 14 November 2026
- CWE
- CWE-770CWE-1285
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