{"affected":[{"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/xzvbailss/MAL-2026-18702.json"},"package":{"ecosystem":"npm","name":"xzvbailss","purl":"pkg:npm/xzvbailss"},"versions":["1.0.0"]}],"credits":[{"contact":["https://cyberxyz.io"],"name":"CyberXYZ","type":"FINDER"}],"database_specific":{"iocs":{"domains":[],"files":[{"digests":{"sha256":"82cfd25fa70f6b4ab089c636cc1cb2d5c5cde9ae1523b67dd27204fc9b073206"},"paths":["lib/Socket/newsletter.js"]}],"ips":[],"urls":[]}},"details":"xzvbailss 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) 120363400505489366@newsletter, 120363430764800148@newsletter (stored base64-encoded), using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","id":"MAL-2026-18702","modified":"2026-11-05T05:15:06.263560600Z","published":"2026-10-26T00:00:00Z","references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/xzvbailss"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"schema_version":"1.9.2","summary":"Malicious code in xzvbailss (npm)"}