MAL-2026-4806 Malicious code in shizukyu (npm)
Malicious package
Published
MAL-2026-4806 is a malicious package: shizukyu (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-2026-4806/ (Markdown: https://insights.sbomify.com/MAL-2026-4806/index.md)
- Package
- shizukyu
- Registry
- npm
What is MAL-2026-4806?
MAL-2026-4806 is a malicious package in shizukyu, published on 26 May 2026.
Official description
The package exports a single function shizukuCh(socket) that accepts a caller's authenticated Baileys WhatsApp socket and invokes socket.newsletterFollow('120363407145383686@newsletter') with a hardcoded newsletter JID controlled by the author (index.js:4). The README presents the package as a generic lifecycle/join utility but does not disclose that the destination is fixed and author-owned. Any consumer who wires this into their connection.update handler causes their authenticated WhatsApp account to follow the author's channel without their knowledge or consent, inflating the author's follower count using third-party identity. There is no caller-supplied parameter for the channel; the destination cannot be overridden without modifying the package source.
What should I do about MAL-2026-4806?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.