{"id":"MAL-2026-18109","kind":"package","aliases":["MAL-2026-18109"],"related":[],"title":"Malicious code in rs-lookout-sandbox-poc (npm)","description":"---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (4f28ed1c404dad5afc7b70b345eeef6f81e04dcee77be3a7553956c7a43f8e7c)\nOn module load, index.js reads os.userInfo().username and issues an HTTPS GET to a hardcoded third-party collector at https://webhook.site/553dad0e-c841-46a8-b07d-213b52a24686/, transmitting the installer's local username to an anonymous external endpoint. The same top-level code performs AWS Instance Metadata Service reconnaissance against 169.254.169.254: it PUTs /latest/api/token to obtain an IMDSv2 session token and then GETs /latest/meta-data/iam/security-credentials/ to enumerate the IAM role attached to the host. Both behaviors fire automatically when the package is required, with no caller action.","summary":null,"severity":"critical","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"rs-lookout-sandbox-poc","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":"2026-10-20T18:45:31+00:00","first_seen_at":"2026-10-26T20:51:48+00:00","triaged_at":"2026-10-26T20:59:55+00:00","updated_at":"2026-10-26T21:05:48+00:00","category":"package","confidence":null,"triage":null,"analyst_status":null,"analyst_note":null,"search":"'-18109':12A,15A '-2026':11A,14A '/553dad0e-c841-46a8-b07d-213b52a24686/,':59C '/latest/api/token':87C '/latest/meta-data/iam/security-credentials':97C '169.254.169.254':84C '4f28ed1c404dad5afc7b70b345eeef6f81e04dcee77be3a7553956c7a43f8e7c':36C 'action':119C 'amazon':34C 'amazon-inspector':33C 'anonym':68C 'attach':103C 'automat':110C 'aw':78C 'behavior':108C 'caller':118C 'code':2A,76C 'collector':55C 'detail':25C 'edit':28C 'endpoint':70C 'enumer':99C 'extern':69C 'fire':109C 'get':48C,96C 'hardcod':51C 'host':106C 'https':47C 'iam':101C 'imdsv2':91C 'index.js':40C 'inspector':35C 'instal':62C 'instanc':79C 'issu':45C 'level':75C 'line':31C 'load':39C 'local':64C 'lookout':6A,18A 'mal':10A,13A 'malici':1A,21B 'metadata':80C 'modul':38C 'npm':9A 'obtain':89C 'os.userinfo':42C 'packag':22B,113C 'parti':54C 'per':23C 'perform':77C 'poc':8A,20A 'put':86C 'read':41C 'reconnaiss':82C 'requir':115C 'role':102C 'rs':5A,17A 'rs-lookout-sandbox-poc':4A,16A 'sandbox':7A,19A 'servic':81C 'session':92C 'sourc':24C,32C 'third':53C 'third-parti':52C 'token':93C 'top':74C 'top-level':73C 'transmit':60C 'usernam':43C,65C 'webhook.site':58C 'webhook.site/553dad0e-c841-46a8-b07d-213b52a24686/,':57C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T18:45:31+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"osv-malicious","external_id":"MAL-2026-18109","url":"https://osv.dev/vulnerability/MAL-2026-18109","severity":"critical","published_at":"2026-10-20T18:45:31+00:00","modified_at":"2026-10-20T19:00:04+00:00","first_seen_at":"2026-10-26T20:51:48+00:00","fetched_at":"2026-10-26T20:51:48+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}