{"id":"MAL-2026-18830","kind":"package","aliases":["MAL-2026-18830"],"related":[],"title":"Malicious code in @fadelsm/baileys (npm)","description":"@fadelsm/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) 120363400362472743@newsletter, 120363406524087186@newsletter, 120363407144637058@newsletter, 120363408367338249@newsletter, 120363409508273158@newsletter, 12036340982021544@newsletter and 4 more (stored as character-code arrays), 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":"@fadelsm/baileys","fixed":[],"affected":"= 7.0.1; = 7.0.2; = 7.0.3; = 7.0.4; = 7.0.5; = 7.0.6; = 7.0.7; = 7.0.8; = 7.0.9","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":"2026-11-09T23:37:52+00:00","triaged_at":"2026-11-09T23:39:36+00:00","updated_at":"2026-11-09T23:39:36+00:00","category":"package","confidence":null,"triage":null,"analyst_status":null,"analyst_note":null,"search":"'-17342':99C '-18830':8A,11A '-2026':7A,10A,98C '120363400362472743':60C '120363406524087186':62C '120363407144637058':64C '120363408367338249':66C '120363409508273158':68C '12036340982021544':70C '4':73C 'account':33C 'array':80C 'authent':85C 'bailey':21C 'behaviour':92C 'channel':36C,57C 'charact':78C 'character-cod':77C 'chosen':37C 'code':2A,45C,79C 'connect':44C 'fadelsm/baileys':4A,12A,15C 'famili':96C 'follow':53C 'fork':18C 'id':58C 'instal':29C 'lib/socket/newsletter.js':47C 'librari':24C 'mal':6A,9A,97C 'malici':1A,13B 'mex':52C 'newslett':61C,63C,65C,67C,69C,71C 'npm':5A 'packag':14B 'phantomsub':95C 'publish':40C 'queri':54C 'send':48C 'session':86C 'silent':26C 'socket':43C 'store':75C 'subscrib':27C 'tell':89C 'use':81C 'victim':83C 'w':51C 'web':23C 'whatsapp':22C,32C,35C,50C 'without':88C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"fix_status":null,"audience":null,"plain_action":null,"pkeys":["baileys"],"ptokens":["baileys","fadelsm"],"labels":["critical","malicious","npm","package"],"campaign_type":null,"search_a":"'-18830':8A,11A '-2026':7A,10A 'code':2A 'fadelsm/baileys':4A,12A 'mal':6A,9A 'malici':1A 'npm':5A","search_b":"'malici':13B 'packag':14B","search_c":"'-17342':99C '-2026':98C '120363400362472743':60C '120363406524087186':62C '120363407144637058':64C '120363408367338249':66C '120363409508273158':68C '12036340982021544':70C '4':73C 'account':33C 'array':80C 'authent':85C 'bailey':21C 'behaviour':92C 'channel':36C,57C 'charact':78C 'character-cod':77C 'chosen':37C 'code':45C,79C 'connect':44C 'fadelsm/baileys':15C 'famili':96C 'follow':53C 'fork':18C 'id':58C 'instal':29C 'lib/socket/newsletter.js':47C 'librari':24C 'mal':97C 'mex':52C 'newslett':61C,63C,65C,67C,69C,71C 'phantomsub':95C 'publish':40C 'queri':54C 'send':48C 'session':86C 'silent':26C 'socket':43C 'store':75C 'subscrib':27C 'tell':89C 'use':81C 'victim':83C 'w':51C 'web':23C 'whatsapp':22C,32C,35C,50C 'without':88C","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-2026-18830","url":"https://osv.dev/vulnerability/MAL-2026-18830","severity":"critical","published_at":"2026-10-27T00:00:00+00:00","modified_at":"2026-11-09T23:15:21+00:00","first_seen_at":"2026-11-09T23:37:52+00:00","fetched_at":"2026-11-09T23:37:52+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"}