cache-poisoning-pwn-demo

The package's postinstall hook (`node -e "try { require('./dist/postinstall.js'); } catch(e) {}"`) loads dist/postinstall.js, which bundles a poisoned is-number module whose top-level IIFE unconditionally calls `child_process.exec` with a platform-specific command: `open -a Calculator` on macOS, `calc.exe` on Windows, `gnome-calculator`/`xcalc` on Linux. The same IIFE is also present in dist/index.js (the package's `main` entry), so any consumer that does `require('cache-poisoning-pwn-demo')` or `import`s it will also spawn a child process with no user consent. The package self-describes as a supply-chain attack demonstration. While today's payload spawns only a calculator, the mechanism is a fully functional install-time and import-time arbitrary-command executor: any installer running `npm install` or any downstream library that transitively requires this package will execute the hardcoded command in the installer's context. The calculator is a demonstration payload; the delivery primitive is a real attack.