
Research
2025 Report: Destructive Malware in Open Source Packages
Destructive malware is rising across open source registries, using delays and kill switches to wipe code, break builds, and disrupt CI/CD.
vm-browserify
Advanced tools
emulate node's vm module for the browser
Just write some client-side javascript:
var vm = require('vm');
window.addEventListener('load', function () {
var res = vm.runInNewContext('a + 5', { a : 100 });
document.querySelector('#res').textContent = res;
});
compile it with browserify:
browserify entry.js -o bundle.js
then whip up some html:
<html>
<head>
<script src="/bundle.js"></script>
</head>
<body>
result = <span id="res"></span>
</body>
</html>
and when you load the page you should see:
result = 105
Evaluate some code in a new iframe with a context.
Contexts are like wrapping your code in a with() except slightly less terrible
because the code is sandboxed into a new iframe.
This module is depended upon by browserify, so you should just be able to
require('vm') and it will just work. However if you want to use this module
directly you can install it with npm:
npm install vm-browserify
MIT
Sandboxed-module is designed to make it easy to require modules with sandboxed globals, timers, and other Node.js features. It is more focused on sandboxing modules rather than arbitrary code execution.
FAQs
vm module for the browser
The npm package vm-browserify receives a total of 2,402,512 weekly downloads. As such, vm-browserify popularity was classified as popular.
We found that vm-browserify demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 40 open source maintainers collaborating on the project.
Did you know?

Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.

Research
Destructive malware is rising across open source registries, using delays and kill switches to wipe code, break builds, and disrupt CI/CD.

Security News
Socket CTO Ahmad Nassri shares practical AI coding techniques, tools, and team workflows, plus what still feels noisy and why shipping remains human-led.

Research
/Security News
A five-month operation turned 27 npm packages into durable hosting for browser-run lures that mimic document-sharing portals and Microsoft sign-in, targeting 25 organizations across manufacturing, industrial automation, plastics, and healthcare for credential theft.