MAL-2026-14221 Malicious code in ssb-test-package (npm)

[email protected] is a dependency-confusion proof-of-concept. package.json declares preinstall: node poc.js, and poc.js runs unconditionally on npm install, collecting host reconnaissance (OS user, hostname, platform, arch, Node version, cwd, and non-internal network interface addresses) into a JSON proof object with rce_status: "CONFIRMED" written to /tmp/npm-dependency-confusion-rce-poc.json. The package has no legitimate library functionality: package.json declares main: index.js but index.js is absent from the tarball; only package.json and poc.js are shipped. The package self-identifies as a PoC for npm dependency confusion using a look-alike internal name. The current build writes reconnaissance data locally and does not exfiltrate over the network, but the preinstall hook demonstrates arbitrary code execution on the installer's host at install time.