OpenSSF/OSV advisory MAL-2026-4806 confirms this npm version as malicious. 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...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in shizukyu (npm)
Details
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.
Decision reason
OpenSSF Malicious Packages via OSV confirms shizukyu@1.0.1 as malicious (MAL-2026-4806): Malicious code in shizukyu (npm)