CVE-2026-47210: Patriksimek VM2

Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days.

vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, a sandbox escape vulnerability in vm2 allows arbitrary code execution in the host process when untrusted code is executed with async support on runtimes exposing WebAssembly JSPI (WebAssembly.promising / WebAssembly.Suspending). In the tested configuration, a JSPI-backed Promise can reach Promise.prototype.finally() in a way that bypasses the expected Promise-species hardening and exposes a host-originated rejection object to attacker-controlled species logic, breaking the sandbox boundary. This issue has been patched in version 3.11.4.

Affected products

• Patriksimek VM2: before 3.11.4 (fixed in 3.11.4)

Published 2026-06-12. Last modified 2026-06-17.