MAL-2026-6120 Malicious code in @caspianph/storyteller (npm)
Malicious package
Published
MAL-2026-6120 is a malicious package: @caspianph/storyteller (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-2026-6120/ (Markdown: https://insights.sbomify.com/MAL-2026-6120/index.md)
- Package
- @caspianph/storyteller
- Registry
- npm
What is MAL-2026-6120?
MAL-2026-6120 is a malicious package in @caspianph/storyteller, published on 18 Jun 2026.
Official description
The package ships setup.cjs containing heavily obfuscated JavaScript with hex-mangled identifiers (_0x32549a, _0x4b2b44, _0x78c349, _0x119ac2) typical of payload-hiding techniques. A file named setup.cjs in an npm package is structurally positioned to be invoked from a lifecycle hook (preinstall/install/postinstall) or required at module load. Legitimate npm packages do not obfuscate their install-time code; obfuscation in this position is overwhelmingly used to hide network beacons, credential reads, or dropper logic from casual inspection.
What should I do about MAL-2026-6120?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.