MAL-2026-13458 Malicious code in squeez (npm)
Malicious package
Published
MAL-2026-13458 is a malicious package: squeez (npm). Every version was published to cause harm.
Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.
Reference: https://insights.sbomify.com/MAL-2026-13458/ (Markdown: https://insights.sbomify.com/MAL-2026-13458/index.md)
- Package
- squeez
- Registry
- npm
What is MAL-2026-13458?
MAL-2026-13458 is a malicious package in squeez, published on 6 Aug 2026.
Official description
[email protected] declares a postinstall hook ("postinstall": "node install.js") that runs automatically on npm install. install.js imports child_process, fs, https, and os; branches on process.platform; reads os.homedir(); performs fs.existsSync/readFileSync checks against paths under the user's home directory; and issues https.get requests to raw.githubusercontent.com URLs. The combination of an install-time lifecycle script, filesystem reads of home-directory paths, process spawning capability, and fetching content from a mutable third-party host at install time constitutes an install-time remote-content-fetch-and-execute pattern with home-directory reconnaissance. Fetching executable content from raw.githubusercontent.com at install time is a mutable, unpinned delivery channel: the current content of those URLs can change at any time without a package release, and the fetched bytes are handled inside a script that also has child_process available.
What should I do about MAL-2026-13458?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.