High severity · published May 13, 2026
CVE-2026-44004
vm2: Host Process OOM DoS via Buffer.alloc (Timeout Bypass)
7.5
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VM
vm2 · patriksimek
< 3.11.0 · source: vendor, NVD
RH
Red Hat Ansible Automation Platform 2.1 · Red Hat
All versions, or not specified · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44004
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-44004
Exploit
https://github.com/patriksimek/vm2/security/advisories/GHSA-6785-pvv7-mvg7
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:50850
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-44004
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2477195
security.access.redhat.com
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44004.json
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