Learn how to use JavaScript’s fs library module to create, read, write, and stream common file types in the JavaScript runtimes Node, Deno, and Bun.

A new Windows zero-day allows threat actors to use malicious JavaScript files to bypass Mark-of-the-Web security warnings. Threat actors are already seen using the zero-day bug in ransomware attacks.

Unlike previous SVG-based threats that relied on hosted payloads or third-party file sharing, this campaign runs entirely within the client’s browser. By avoiding executable drops and leveraging ...