MAL-2026-16307

    Dashboard / Malicious Package / MAL-2026-16307

    MAL-2026-16307

    Published: 21 Sept 2026Last Modified: 21 Sept 2026

    Summary: Malicious code in chai-testing (npm)

    Details: Source: amazon-inspector (da6bebc82e500e38b0ab9c507b1d56c18a05a1ffd04fcee60f0dcad991c8944a) The package's main entry (index.js) spawns a detached `node lib/caller.js` when the module is required. caller.js base64-decodes a hardcoded URL (https://ipcheck-hashed.vercel.app/api/auth/...) stored in a fake `process.env.DEV_API_KEY` constant, POSTs to that endpoint via axios, and executes the returned body by constructing a Function and invoking it with Node's `require`. The endpoint and header values are base64-encoded and decoded with atob at runtime to hide the destination from review. The package name and README metadata mimic legitimate chai/pino testing and logging libraries, but the shipped code is unrelated to any advertised functionality. Requiring the module — including via the exported middleware, which invokes the dropper as a side effect — triggers execution of attacker-controlled JavaScript with full Node privileges on the installer's host.

    References: https://www.npmjs.com/package/chai-testing/v/1.1.4

    Affected packages

    Package

    Name: chai-testing

    Purl: pkg:npm/chai-testing

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    1.1.4