{"id":"MAL-2026-18988","kind":"package","aliases":["MAL-2026-18988"],"related":[],"title":"Malicious code in malvin-baileys (npm)","description":"malvin-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) 120363391079867105@newsletter, 120363399205146445@newsletter and a list downloaded at runtime from https://cdn.malvintech.sbs/file/chJids.json (the URL itself stored as base64 strings), 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":"malvin-baileys","fixed":[],"affected":"= 2.2.0; = 2.2.1; = 2.2.2; = 2.2.3; = 2.2.4; = 2.2.5","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":"2026-11-09T23:38:04+00:00","triaged_at":"2026-11-09T23:45:47+00:00","updated_at":"2026-11-09T23:45:47+00:00","category":"package","confidence":null,"triage":null,"analyst_status":null,"analyst_note":null,"search":"'-17342':105C '-18988':10A,13A '-2026':9A,12A,104C '/file/chjids.json':79C '120363391079867105':66C '120363399205146445':68C 'account':39C 'authent':91C 'bailey':6A,21C,27C 'baileys':16A 'base64':85C 'behaviour':98C 'cdn.malvintech.sbs':78C 'cdn.malvintech.sbs/file/chjids.json':77C 'channel':42C,63C 'chosen':43C 'code':2A,51C 'connect':50C 'download':73C 'famili':102C 'follow':59C 'fork':24C 'id':64C 'instal':35C 'lib/socket/newsletter.js':53C 'librari':30C 'list':72C 'mal':8A,11A,103C 'malici':1A,17B 'malvin':5A,15A,20C 'malvin-bailey':4A,19C 'malvin-baileys':14A 'mex':58C 'newslett':67C,69C 'npm':7A 'packag':18B 'phantomsub':101C 'publish':46C 'queri':60C 'runtim':75C 'send':54C 'session':92C 'silent':32C 'socket':49C 'store':83C 'string':86C 'subscrib':33C 'tell':95C 'url':81C 'use':87C 'victim':89C 'w':57C 'web':29C 'whatsapp':28C,38C,41C,56C 'without':94C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"fix_status":null,"audience":null,"plain_action":null,"pkeys":["malvinbaileys"],"ptokens":["baileys","malvin"],"labels":["critical","malicious","npm","package"],"campaign_type":null,"search_a":"'-18988':10A,13A '-2026':9A,12A 'bailey':6A 'baileys':16A 'code':2A 'mal':8A,11A 'malici':1A 'malvin':5A,15A 'malvin-bailey':4A 'malvin-baileys':14A 'npm':7A","search_b":"'malici':17B 'packag':18B","search_c":"'-17342':105C '-2026':104C '/file/chjids.json':79C '120363391079867105':66C '120363399205146445':68C 'account':39C 'authent':91C 'bailey':21C,27C 'base64':85C 'behaviour':98C 'cdn.malvintech.sbs':78C 'cdn.malvintech.sbs/file/chjids.json':77C 'channel':42C,63C 'chosen':43C 'code':51C 'connect':50C 'download':73C 'famili':102C 'follow':59C 'fork':24C 'id':64C 'instal':35C 'lib/socket/newsletter.js':53C 'librari':30C 'list':72C 'mal':103C 'malvin':20C 'malvin-bailey':19C 'mex':58C 'newslett':67C,69C 'phantomsub':101C 'publish':46C 'queri':60C 'runtim':75C 'send':54C 'session':92C 'silent':32C 'socket':49C 'store':83C 'string':86C 'subscrib':33C 'tell':95C 'url':81C 'use':87C 'victim':89C 'w':57C 'web':29C 'whatsapp':28C,38C,41C,56C 'without':94C","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-2026-18988","url":"https://osv.dev/vulnerability/MAL-2026-18988","severity":"critical","published_at":"2026-10-27T00:00:00+00:00","modified_at":"2026-11-09T23:15:32+00:00","first_seen_at":"2026-11-09T23:38:04+00:00","fetched_at":"2026-11-09T23:38:04+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"}