{"affected":[{"database_specific":{"cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}],"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@zyrennofficiall/baileys/MAL-2026-18684.json"},"package":{"ecosystem":"npm","name":"@zyrennofficiall/baileys","purl":"pkg:npm/%40zyrennofficiall/baileys"},"versions":["5.1.0","5.2.0","5.3.0","5.4.0","5.5.0"]}],"credits":[{"contact":["https://cyberxyz.io"],"name":"CyberXYZ","type":"FINDER"}],"database_specific":{"iocs":{"domains":[],"files":[{"digests":{"sha256":"20563a542cc514c1dfb2f4f44a653d6740189ab9c5b34da5c7313e69c0608ea4"},"paths":["lib/Socket/newsletter.js"]}],"ips":[],"urls":[]}},"details":"@zyrennofficiall/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. A timer started when the socket connects, in lib/Socket/newsletter.js, sends the WhatsApp w:mex FOLLOW query for the channel ID(s) 120363408893555851@newsletter, 120363426470081124@newsletter, 120363427718144294@newsletter (stored base64-encoded), using the victim's authenticated session and without telling them. This is separate from the update-channel follow the package announces in lib/Socket/index.js. Same behaviour as the PhantomSub family (MAL-2026-17342).","id":"MAL-2026-18684","modified":"2026-11-05T05:15:05.063438071Z","published":"2026-10-26T00:00:00Z","references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/@zyrennofficiall/baileys"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"schema_version":"1.9.2","summary":"Malicious code in @zyrennofficiall/baileys (npm)"}