{"id":"MAL-2026-19048","kind":"package","aliases":["MAL-2026-19048"],"related":[],"title":"Malicious code in zexxo-baileys (npm)","description":"zexxo-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 dist/core/Socket/newsletter.js, lib/Socket/newsletter.js sends the WhatsApp w:mex FOLLOW query for the channel ID(s) 120363403828324716@newsletter, 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":"zexxo-baileys","fixed":[],"affected":"= 1.1.1; = 1.1.2; = 1.1.3; = 1.2.1; = 1.2.2","ecosystem":"npm"}],"ecosystems":["npm"],"tags":["malicious","package"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-27T00:00:00+00:00","first_seen_at":"2026-11-09T23:38:08+00:00","triaged_at":"2026-11-09T23:47:53+00:00","updated_at":"2026-11-09T23:47:53+00:00","category":"package","confidence":null,"triage":null,"analyst_status":null,"analyst_note":null,"search":"'-17342':87C '-19048':10A,13A '-2026':9A,12A,86C '120363403828324716':67C 'account':39C 'authent':73C 'bailey':6A,21C,27C 'baileys':16A 'behaviour':80C 'channel':42C,64C 'chosen':43C 'code':2A,51C 'connect':50C 'dist/core/socket/newsletter.js':53C 'famili':84C 'follow':60C 'fork':24C 'id':65C 'instal':35C 'lib/socket/newsletter.js':54C 'librari':30C 'mal':8A,11A,85C 'malici':1A,17B 'mex':59C 'newslett':68C 'npm':7A 'packag':18B 'phantomsub':83C 'publish':46C 'queri':61C 'send':55C 'session':74C 'silent':32C 'socket':49C 'subscrib':33C 'tell':77C 'use':69C 'victim':71C 'w':58C 'web':29C 'whatsapp':28C,38C,41C,57C 'without':76C 'zexxo':5A,15A,20C 'zexxo-bailey':4A,19C 'zexxo-baileys':14A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"fix_status":null,"audience":null,"plain_action":null,"pkeys":["zexxobaileys"],"ptokens":["baileys","zexxo"],"labels":["critical","malicious","npm","package"],"campaign_type":null,"search_a":"'-19048':10A,13A '-2026':9A,12A 'bailey':6A 'baileys':16A 'code':2A 'mal':8A,11A 'malici':1A 'npm':7A 'zexxo':5A,15A 'zexxo-bailey':4A 'zexxo-baileys':14A","search_b":"'malici':17B 'packag':18B","search_c":"'-17342':87C '-2026':86C '120363403828324716':67C 'account':39C 'authent':73C 'bailey':21C,27C 'behaviour':80C 'channel':42C,64C 'chosen':43C 'code':51C 'connect':50C 'dist/core/socket/newsletter.js':53C 'famili':84C 'follow':60C 'fork':24C 'id':65C 'instal':35C 'lib/socket/newsletter.js':54C 'librari':30C 'mal':85C 'mex':59C 'newslett':68C 'phantomsub':83C 'publish':46C 'queri':61C 'send':55C 'session':74C 'silent':32C 'socket':49C 'subscrib':33C 'tell':77C 'use':69C 'victim':71C 'w':58C 'web':29C 'whatsapp':28C,38C,41C,57C 'without':76C 'zexxo':20C 'zexxo-bailey':19C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-10-27T00:00:00+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"osv-malicious","external_id":"MAL-2026-19048","url":"https://osv.dev/vulnerability/MAL-2026-19048","severity":"critical","published_at":"2026-10-27T00:00:00+00:00","modified_at":"2026-11-09T23:15:38+00:00","first_seen_at":"2026-11-09T23:38:08+00:00","fetched_at":"2026-11-09T23:38:08+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}