CVE-2026-43997: VM2 Project VM2

Critical severity, CVSS 10.0. EPSS: 0.8% chance of exploitation in the next 30 days.

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, it is possible to obtain the host Object. There are various ways to use the host Object, to escape the sandbox, one example would be using HostObject.getOwnPropertySymbols to obtain Symbol(nodejs.util.inspect.custom). This vulnerability is fixed in 3.11.0.

Affected products

• VM2 Project VM2: before 3.11.0 (fixed in 3.11.0)

Published 2026-05-13. Last modified 2026-09-07.