{"id":"MAL-2026-18891","summary":"Malicious code in @sanz-0fx/baileys-mod (npm)","details":"@sanz-0fx/baileys-mod 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 (stored as base64 strings), using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","modified":"2026-11-09T23:15:24.707513846Z","published":"2026-10-27T00:00:00Z","database_specific":{"iocs":{"domains":[],"files":[{"paths":["lib/Socket/newsletter.js"],"digests":{"sha256":"848ef117cd669ab36564ee6759735221e337e732af9507e995dd5aacc8415fb5"}}],"ips":[],"urls":[]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/@sanz-0fx/baileys-mod"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"@sanz-0fx/baileys-mod","ecosystem":"npm","purl":"pkg:npm/%40sanz-0fx/baileys-mod"},"versions":["1.0.3-beta"],"database_specific":{"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@sanz-0fx/baileys-mod/MAL-2026-18891.json","cwes":[{"description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code","cweId":"CWE-506"}]}}],"schema_version":"1.9.2","credits":[{"name":"CyberXYZ","contact":["https://cyberxyz.io"],"type":"FINDER"}]}