AIKIDO-2026-98028
vm2 is vulnerable to Sandbox Escape
100
Critical Risk
This Affects:
vm2TL;DR
The streaming WebAssembly APIs return a promise whose machinery is host-realm rather than sandbox-realm, so a host-realm rejection bypasses the sandbox's promise hardening. Using Promise.prototype.finally together with species control, sandboxed code captures the host error object. It then reaches the host Function constructor through the error's constructor chain to recover the host process object and escape the sandbox. The fix removes the streaming WebAssembly compile and instantiate functions from the sandbox.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you run untrusted code on Node.js 26 where the sandbox can reach the streaming WebAssembly APIs.
Background info
vm2 is vulnerable to Sandbox Escape in versions 3.10.1 - 3.11.6.
How to fix this
Upgrade the vm2 library to the patch version.
Are You Affected?
Connect your repositories to instantly see whether vulnerable or malicious packages exist in your codebase.
Free. No credit card required.
I consent to receiving marketing communications based on Aikido’s Privacy Policy.
SOC 2Compliant
ISO 27001Compliant