{"id":"MAL-2026-18942","summary":"Malicious code in baileys-multidev (npm)","details":"baileys-multidev 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 a list downloaded at runtime from https://raw.githubusercontent.com/ZackRylsen/Assets/refs/heads/main/config/ChannelId.json, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","modified":"2026-11-09T23:15:27.039865526Z","published":"2026-10-27T00:00:00Z","database_specific":{"iocs":{"urls":["https://raw.githubusercontent.com/ZackRylsen/Assets/refs/heads/main/config/ChannelId.json"],"domains":["raw.githubusercontent.com"],"files":[{"digests":{"sha256":"e38239e69158af68f0aefaebbcacbfb833fc8e7c932eccdfd6da4497fa1d0790"},"paths":["lib/Socket/newsletter.js"]}],"ips":[]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/baileys-multidev"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"baileys-multidev","ecosystem":"npm","purl":"pkg:npm/baileys-multidev"},"versions":["8.0.2"],"database_specific":{"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/baileys-multidev/MAL-2026-18942.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"}]}