CVE-2026-47210 | THREATINT

Description

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.

PUBLISHED Reserved 2026-05-18 | Published 2026-06-12 | Updated 2026-06-13 | Assigner GitHub_M

CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

CWE-913: Improper Control of Dynamically-Managed Code Resources

Product status

< 3.11.4

affected

References

github.com/...ek/vm2/security/advisories/GHSA-6j2x-vhqr-qr7q exploit

github.com/...ek/vm2/security/advisories/GHSA-6j2x-vhqr-qr7q

github.com/...ommit/6915fa4d9bcebd47b9a4f39a1adc1aa94ef6ffc6

github.com/patriksimek/vm2/releases/tag/v3.11.4

cve.org (CVE-2026-47210)

nvd.nist.gov (CVE-2026-47210)

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