{"id":"MAL-2026-18831","summary":"Malicious code in @fadzzzslebew/baileys (npm)","details":"@fadzzzslebew/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) 120363422054951473@newsletter, 120363423758386098@newsletter, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","modified":"2026-11-09T23:15:17.744654809Z","published":"2026-10-27T00:00:00Z","database_specific":{"iocs":{"files":[{"paths":["lib/Socket/newsletter.js"],"digests":{"sha256":"773a6daa18ac019c0a5d35b9d0e1e76956b02d6f73269fd1456563c10c768d66"}}],"ips":[],"urls":[],"domains":[]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/@fadzzzslebew/baileys"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"@fadzzzslebew/baileys","ecosystem":"npm","purl":"pkg:npm/%40fadzzzslebew/baileys"},"versions":["0.1.1"],"database_specific":{"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@fadzzzslebew/baileys/MAL-2026-18831.json","cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}]}}],"schema_version":"1.9.2","credits":[{"name":"CyberXYZ","contact":["https://cyberxyz.io"],"type":"FINDER"}]}