{"id":"MAL-2026-18860","summary":"Malicious code in @kyynotdevv/baileys (npm)","details":"@kyynotdevv/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) 120363405751989725@newsletter, 120363407393907794@newsletter, 120363409815577276@newsletter, 120363424433029723@newsletter, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","modified":"2026-11-09T23:15:23.546554604Z","published":"2026-10-27T00:00:00Z","database_specific":{"iocs":{"files":[{"digests":{"sha256":"516b197899fbadce42ac8dd645805213dc596292c7c6a873025542400f346a6d"},"paths":["lib/Socket/newsletter.js"]},{"paths":["lib/Socket/newsletter.js"],"digests":{"sha256":"b5519bf81a371e410eaa9a4766d13428b9eae863aa48663057338e354ddc63e4"}},{"paths":["lib/Socket/newsletter.js"],"digests":{"sha256":"fc4dcb8355a9ff4a17a05bf9baed0048374b4707e5fc9fcf81d037bc0669ae99"}}],"ips":[],"urls":[],"domains":[]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/@kyynotdevv/baileys"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"@kyynotdevv/baileys","ecosystem":"npm","purl":"pkg:npm/%40kyynotdevv/baileys"},"versions":["2.0.3","2.0.4","2.0.6"],"database_specific":{"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@kyynotdevv/baileys/MAL-2026-18860.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"}]}