{"id":"MAL-2026-18919","summary":"Malicious code in @yemo-dev/yebail (npm)","details":"@yemo-dev/yebail 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/messages-recv.js sends the WhatsApp w:mex FOLLOW query for the channel ID(s) 120363408975923153@newsletter, 120363421171049265@newsletter (stored as character-code arrays), using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","modified":"2026-11-09T23:15:29.333745572Z","published":"2026-10-27T00:00:00Z","database_specific":{"iocs":{"domains":[],"files":[{"paths":["lib/Socket/messages-recv.js"],"digests":{"sha256":"38da17bfd3c9805e8d60c765890d6fee4cc9777aca592ef448410a70b6a89875"}},{"digests":{"sha256":"49fe5eff4c2ab69e6757b4eafd39dbf13445b2b2e003782b319b6cc1f3b7a324"},"paths":["lib/Socket/messages-recv.js"]},{"paths":["lib/Socket/messages-recv.js"],"digests":{"sha256":"8007b347a931faf7e763824063cbf9cbbc46080e6d527145fa46d1750fa84dec"}},{"digests":{"sha256":"86c454763a17c1605b8b73bc9d485f89c2912349ace3ff39bfbaf8310d7d7823"},"paths":["lib/Socket/messages-recv.js"]},{"digests":{"sha256":"a065d127382b5c24241b340473bbecbf46c5a4ebad40cd5b71eb3260806307fe"},"paths":["lib/Socket/messages-recv.js"]},{"paths":["lib/Socket/messages-recv.js"],"digests":{"sha256":"e3bb0e9cce78ca4053307f0ef33c0567d15e64f9354686d1c58d3abd99644aa5"}},{"digests":{"sha256":"e67db0411e5aa68d38ebcfa477a32fe25fd339aed18ee1b929e8d6c69187d72d"},"paths":["lib/Socket/messages-recv.js"]},{"digests":{"sha256":"f8e962ba9af2b6a9f340e79b3958e3004226b1b417678fb25ce249e614048418"},"paths":["lib/Socket/messages-recv.js"]},{"paths":["lib/Socket/messages-recv.js"],"digests":{"sha256":"fd9328b2136dfa1e334f78e18327b71e38b770e008c89353d5faad43711f5421"}}],"ips":[],"urls":[]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/@yemo-dev/yebail"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"@yemo-dev/yebail","ecosystem":"npm","purl":"pkg:npm/%40yemo-dev/yebail"},"versions":["1.0.0","1.0.1","1.1.0","1.1.1","1.1.2","1.1.3","1.1.4","1.2.0","1.2.1","2.0.0","2.0.1","2.0.2","3.0.1","3.0.2","3.0.3","3.0.4","3.0.5","3.0.6","4.0.0","4.0.1","4.0.2","4.0.3","4.0.4","4.0.5","4.1.0","4.1.1","4.1.2","4.1.3","4.1.4","4.1.5","4.1.6","4.2.0","4.2.1","4.2.10","4.2.11","4.2.12","4.2.2","4.2.3","4.2.4","4.2.5","4.2.6","4.2.7","4.2.8","4.2.9"],"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/@yemo-dev/yebail/MAL-2026-18919.json"}}],"schema_version":"1.9.2","credits":[{"name":"CyberXYZ","contact":["https://cyberxyz.io"],"type":"FINDER"}]}