Vulnerability MAL-2026-19029

vinzz-baileys is a fork of the Baileys WhatsApp Web library that silently subscribes the installer's own WhatsApp account to WhatsApp Channels chosen by the publisher. When the socket connects, code in lib/Socket/newsletter.js sends the WhatsApp w:mex FOLLOW query for the channel ID(s) 120363400738305381@newsletter, 120363420757607688@newsletter, 120363422701490267@newsletter, 120363425000320171@newsletter (stored as base64 strings) and a list downloaded at runtime from https://raw.githubusercontent.com/VinzzOfficial/VinzzNewsleter/refs/heads/main/idch.json, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).