{"id":"MAL-2026-19047","summary":"Malicious code in zenvyflump (npm)","details":"zenvyflump 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) 120363406881628130@newsletter, 120363408522985879@newsletter, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","modified":"2026-11-09T23:15:38.997060778Z","published":"2026-10-27T00:00:00Z","database_specific":{"iocs":{"urls":[],"domains":[],"files":[{"paths":["lib/Socket/newsletter.js"],"digests":{"sha256":"c7f74bc07dc3690c243d91fa576bcb48c533126396ce0773cf0a2e71e244361c"}},{"digests":{"sha256":"e97ebd9aa0495c5baa7faf2760fd568bf1138bf26546f0ee1887ddc5e99bb518"},"paths":["lib/Socket/newsletter.js"]}],"ips":[]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/zenvyflump"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"zenvyflump","ecosystem":"npm","purl":"pkg:npm/zenvyflump"},"versions":["2.0.0","2.0.1","2.0.2","2.0.3"],"database_specific":{"cwes":[{"description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code","cweId":"CWE-506"}],"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/zenvyflump/MAL-2026-19047.json"}}],"schema_version":"1.9.2","credits":[{"name":"CyberXYZ","contact":["https://cyberxyz.io"],"type":"FINDER"}]}