Allocation of Resources Without Limits or Throttling in vm2 - CVE-2026-47683
Published: August 15, 2026
Vulnerability identifier: #VU142653
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-47683
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in Buffer.concat and Buffer.from array-like handling when processing sandbox-supplied Buffer allocation requests. A remote attacker can send crafted sandbox code to trigger large host Buffer allocations and cause a denial of service.
The issue affects host external-memory allocation paths that bypass the configured buffer allocation cap, and the synchronous allocation cannot be preempted by the timeout mechanism.
Affected software
vm2
How to mitigate CVE-2026-47683
Install security update from vendor's website.
vm2 - update to 3.11.6