{"id":"MAL-2026-17658","revision":"146a541a8feb459786aad00f6c62a7d1","records":[{"revision":"146a541a8feb459786aad00f6c62a7d1","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"MAL-2026-17658","aliases":[],"title":"Malicious code in hardhat-bits (npm)","description":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (4e10f22980d33eea7649312f6b2b0a94637e5b4da400f7d585c58b6902a77944)\nThe package is published as hardhat-bits but its README, LICENSE, docs/, and lib/* files are copied verbatim from the pino logger project, providing cover for an inserted file at lib/config.js. index.js performs `const config = require('./lib/config')` at the top level, so the file executes unconditionally when the module is required. lib/config.js is a single-line, ~4.47 MB obfuscator.io output: a 26,130-entry shuffled string array with a rotating decoder, hex-escaped member access, RC4-style key-schedule string decoding, control-flow flattening, and a self-defending IIFE. The exported `middleware` in index.js is a no-op `(_req, _res, next) => next()`, so the obfuscated module serves no documented purpose in the public API. The combination of name/branding mismatch (hardhat tooling name, pino content), a stub public API, and a multi-megabyte obfuscated blob auto-executed on import matches the trojan-loader shape used by npm supply-chain malware; any installer that requires hardhat-bits runs attacker-controlled code hidden behind the obfuscation.\n","state":0,"publishedAt":"2026-10-08T03:39:07+00:00","modifiedAt":"2026-10-08T04:00:05.1369328+00:00","affected":[{"ecosystem":"npm","name":"hardhat-bits","ranges":[],"versions":["2.21.0"],"rawVersionEvidence":null}],"metrics":[],"references":["https://www.npmjs.com/package/hardhat-bits/v/2.21.0"],"sourceUrl":"https://osv.dev/vulnerability/MAL-2026-17658","license":"OSV · upstream source license applies","key":"osv:MAL-2026-17658","identifiers":["MAL-2026-17658"]},"retained":false,"historicalAffected":[]}],"coverage":[]}