MAL-2026-13821 Malicious code in mnchfnvbue1 (npm)

The tarball contains a single file, index.html, declared as the package main. The HTML contains heavily obfuscated JavaScript that mimics a Cloudflare 'Just a moment…' interstitial and, after a 1-second timeout, decodes a string-array to build a URL and calls window.location.replace to navigate a browser to that URL. There are no npm lifecycle scripts (preinstall/install/postinstall/prepare), no bin entry, and main points at a non-JavaScript file, so npm install and require() do not execute this code on an installer's machine. The redirect only fires in a browser rendering the HTML. The package appears to be registry abuse (using npm to host an obfuscated browser redirect asset) rather than a supply-chain attack against installers.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.