{"id":"MAL-2026-18926","summary":"Malicious code in @zeppeliorg/xzcbailz (npm)","details":"@zeppeliorg/xzcbailz 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) 120363420757607688@newsletter, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","modified":"2026-11-09T23:15:26.134141481Z","published":"2026-10-27T00:00:00Z","database_specific":{"iocs":{"ips":[],"urls":[],"domains":[],"files":[{"digests":{"sha256":"4f8e790c3fc5dfbd49178404c6e9c3bbd53a22baea9e0e5b751f814c3d01bed9"},"paths":["lib/Socket/newsletter.js"]}]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/@zeppeliorg/xzcbailz"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"@zeppeliorg/xzcbailz","ecosystem":"npm","purl":"pkg:npm/%40zeppeliorg/xzcbailz"},"versions":["1.0.0","1.0.1","1.0.2"],"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/@zeppeliorg/xzcbailz/MAL-2026-18926.json"}}],"schema_version":"1.9.2","credits":[{"name":"CyberXYZ","contact":["https://cyberxyz.io"],"type":"FINDER"}]}