{"id":"MAL-2026-18670","summary":"Malicious code in @axo_cuy/baileyss (npm)","details":"@axo_cuy/baileyss 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) 120363412451922209@newsletter (stored base64-encoded), using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","modified":"2026-11-05T05:15:03.451910758Z","published":"2026-10-26T00:00:00Z","database_specific":{"iocs":{"urls":[],"domains":[],"files":[{"digests":{"sha256":"050d2ba4319861513d38f00dcd99670f6f215736742094e6610d45d5d2b43aba"},"paths":["lib/Socket/newsletter.js"]},{"digests":{"sha256":"05a23a1aa9221eeb216a62247b3a49a47e672d850e274cdd5f126a72a813b43e"},"paths":["lib/Socket/newsletter.js"]},{"digests":{"sha256":"a72abc445c6f71496fa9cb7e3df892eea508ff00711d199d410c04fe3c9a74f4"},"paths":["lib/Socket/newsletter.js"]}],"ips":[]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/@axo_cuy/baileyss"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"@axo_cuy/baileyss","ecosystem":"npm","purl":"pkg:npm/%40axo_cuy/baileyss"},"versions":["1.0.0","1.0.1","3.0.1"],"database_specific":{"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@axo_cuy/baileyss/MAL-2026-18670.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"}]}