require is not defined when executing in vm

[zka]

Hello,

why don't we have access to require in vm module ?

here is the code:

var vm = require('vm');
var script = vm.createScript("var vm = require('vm');", 'sandbox.vm');
script.runInNewContext();

it throw a ReferenceError: require is not defined

[mscdex]

IIRC the vm module supplies you with a v8 vm, not a node vm.

[Isaac Schlueter]

The purpose of the vm module is to create a new v8 virtual machine
that can be used for any purpose, especially sandboxing code. If
require() is exposed by default, then your sandbox has landmines.

If you want, you can expose stuff to the vm context like this:

var vm = require('vm')

var ret = vm.createScript('typeof require',
'sandbox.vm').runInNewContext({require:require})

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