The npm package ded-pwa-ded-pwa-core version 35.6.3 contains malicious code that executes arbitrary binaries on the host system. Upon requiring the package, it downloads an opaque binary from author-controlled Cloudflare Workers endpoints, writes it to disk with disguised filenames, sets executable permissions, and spawns it detached from the main process. The package uses obfuscation techniques to evade detection, including runtime hostname reconstruction and split-string method calls. This results in arbitrary code execution on any system that installs or requires this package.