{"id":"MAL-2026-19149","kind":"package","aliases":["MAL-2026-19149"],"related":[],"title":"Malicious code in superlib_ex3 (npm)","description":"Malicious package. `superlib_ex3` is a multi-stage loader: on install it fetches and executes a second-stage payload from the attacker-controlled host `x.exxcube.fr` (the install hook was observed in dynamic detonation retrieving `https://x.exxcube.fr/postInstall`). No legitimate functionality; all published versions are malicious. Full indicators at the reference below.","summary":null,"severity":"critical","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"superlib_ex3","note":"all versions","fixed":[],"affected":"","ecosystem":"npm"}],"ecosystems":["npm"],"tags":["malicious","package"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-08T01:30:00+00:00","first_seen_at":"2026-11-12T05:46:09+00:00","triaged_at":"2026-11-12T05:47:21+00:00","updated_at":"2026-11-12T05:48:12+00:00","category":"package","confidence":null,"triage":null,"analyst_status":null,"analyst_note":null,"search":"'-19149':9A,12A '-2026':8A,11A '/postinstall':56C 'attack':41C 'attacker-control':40C 'code':2A 'control':42C 'deton':52C 'dynam':51C 'ex3':5A,14A,20C 'execut':32C 'fetch':30C 'full':65C 'function':59C 'hook':47C 'host':43C 'indic':66C 'instal':28C,46C 'legitim':58C 'loader':26C 'mal':7A,10A 'malici':1A,15B,17C,64C 'multi':24C 'multi-stag':23C 'npm':6A 'observ':49C 'packag':16B,18C 'payload':37C 'publish':61C 'refer':69C 'retriev':53C 'second':35C 'second-stag':34C 'stage':25C,36C 'superlib':4A,13A,19C 'version':62C 'x.exxcube.fr':44C,55C 'x.exxcube.fr/postinstall':54C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":null,"audience":null,"plain_action":null,"pkeys":["superlibex3"],"ptokens":["ex3","superlib"],"labels":["critical","malicious","npm","package"],"campaign_type":null,"search_a":"'-19149':9A,12A '-2026':8A,11A 'code':2A 'ex3':5A,14A 'mal':7A,10A 'malici':1A 'npm':6A 'superlib':4A,13A","search_b":"'malici':15B 'packag':16B","search_c":"'/postinstall':56C 'attack':41C 'attacker-control':40C 'control':42C 'deton':52C 'dynam':51C 'ex3':20C 'execut':32C 'fetch':30C 'full':65C 'function':59C 'hook':47C 'host':43C 'indic':66C 'instal':28C,46C 'legitim':58C 'loader':26C 'malici':17C,64C 'multi':24C 'multi-stag':23C 'observ':49C 'packag':18C 'payload':37C 'publish':61C 'refer':69C 'retriev':53C 'second':35C 'second-stag':34C 'stage':25C,36C 'superlib':19C 'version':62C 'x.exxcube.fr':44C,55C 'x.exxcube.fr/postinstall':54C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-08T01:30:00+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"osv-malicious","external_id":"MAL-2026-19149","url":"https://osv.dev/vulnerability/MAL-2026-19149","severity":"critical","published_at":"2026-11-08T01:30:00+00:00","modified_at":"2026-11-12T05:30:08+00:00","first_seen_at":"2026-11-12T05:46:09+00:00","fetched_at":"2026-11-12T05:46:09+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"}