{"id":"MAL-2026-18683","kind":"package","aliases":["MAL-2026-18683"],"related":[],"title":"Malicious code in @zaxius/baileys (npm)","description":"@zaxius/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) , using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","summary":null,"severity":"critical","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"@zaxius/baileys","fixed":[],"affected":"= 1.0.1","ecosystem":"npm"}],"ecosystems":["npm"],"tags":["malicious","package"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-26T00:00:00+00:00","first_seen_at":"2026-11-05T06:31:45+00:00","triaged_at":"2026-11-05T06:32:52+00:00","updated_at":"2026-11-05T06:32:52+00:00","category":"package","confidence":null,"triage":null,"analyst_status":null,"analyst_note":null,"search":"'-17342':78C '-18683':8A,11A '-2026':7A,10A,77C 'account':33C 'authent':64C 'bailey':21C 'behaviour':71C 'channel':36C,57C 'chosen':37C 'code':2A,45C 'connect':44C 'famili':75C 'follow':53C 'fork':18C 'id':58C 'instal':29C 'lib/socket/newsletter.js':47C 'librari':24C 'mal':6A,9A,76C 'malici':1A,13B 'mex':52C 'npm':5A 'packag':14B 'phantomsub':74C 'publish':40C 'queri':54C 'send':48C 'session':65C 'silent':26C 'socket':43C 'subscrib':27C 'tell':68C 'use':60C 'victim':62C 'w':51C 'web':23C 'whatsapp':22C,32C,35C,50C 'without':67C 'zaxius/baileys':4A,12A,15C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"fix_status":null,"audience":null,"plain_action":null,"pkeys":["baileys"],"ptokens":["baileys","zaxius"],"labels":["critical","malicious","npm","package"],"campaign_type":null,"first_public_at":"2026-10-26T00:00:00+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"osv-malicious","external_id":"MAL-2026-18683","url":"https://osv.dev/vulnerability/MAL-2026-18683","severity":"critical","published_at":"2026-10-26T00:00:00+00:00","modified_at":"2026-11-05T05:15:04+00:00","first_seen_at":"2026-11-05T06:31:45+00:00","fetched_at":"2026-11-05T06:31:45+00:00","note":null}],"documents":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}