{"id":"MAL-2026-18923","summary":"Malicious code in @zentrix/baileys (npm)","details":"@zentrix/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) 120363425412882254@newsletter (stored as base64 strings), using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","modified":"2026-11-09T23:15:22.233254332Z","published":"2026-10-27T00:00:00Z","database_specific":{"iocs":{"urls":[],"domains":[],"files":[{"digests":{"sha256":"7f3afb5e8c6ec49b34aa84b55d4019b20c4b2687757f7e1fb7b00317dfd21247"},"paths":["lib/Socket/newsletter.js"]},{"digests":{"sha256":"da1d021bbc17420e4c1acb80ed405779207f2d4de6148d4f2ed33d69d02ee378"},"paths":["lib/Socket/newsletter.js"]}],"ips":[]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/@zentrix/baileys"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"@zentrix/baileys","ecosystem":"npm","purl":"pkg:npm/%40zentrix/baileys"},"versions":["4.1.5","4.1.9","4.2.0","4.2.1","4.2.2","4.2.3","4.2.4","4.2.5"],"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/@zentrix/baileys/MAL-2026-18923.json"}}],"schema_version":"1.9.2","credits":[{"name":"CyberXYZ","contact":["https://cyberxyz.io"],"type":"FINDER"}]}