MAL-2026-14221

    Dashboard / Malicious Package / MAL-2026-14221

    MAL-2026-14221

    Published: 19 Aug 2026Last Modified: 19 Aug 2026

    Summary: Malicious code in ssb-test-package (npm)

    Details: Source: amazon-inspector (086e13ef78d9987210a95cc9e70359d982cd9dbffa59d674d6f5ed3cb8f8a725) [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.

    References: https://www.npmjs.com/package/ssb-test-package/v/1.0.0

    Affected packages

    Package

    Name: ssb-test-package

    Purl: pkg:npm/ssb-test-package

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    1.0.0