Malicious code in hardhat-cap (npm)

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (f3d9de53c9b5916edf45f9055ecdb2fbdd0752cfe7779f37c7d294a16788faf8) The package is published as `hardhat-cap` but its README, LICENSE, index.d.ts, and lib/proto.js / lib/tools.js are a verbatim copy of the pino logger, with author metadata pointing at jsonspack.com. index.js unconditionally does `const config = require('./lib/config');`, and lib/config.js is a ~4 MB single-line obfuscator.io-transformed module (rotated string array of ~23,931 entries, dual decoders, RC4+base64 string decoding, control-flow flattening) whose top-level IIFE self-invokes at load time. Requiring the package executes this opaque payload on the installer's host at import time; the surrounding pino code is unrelated cover. A logger has no need for a multi-megabyte obfuscated self-decoding blob, and the name/contents mismatch (Hardhat-themed name, pino source, obfuscated third module) is consistent with a typosquat lure that drops arbitrary code execution into consumers on `require`. ## Source: ghsa-malware (ccce44942655178e47726747129cc46b08ececfec2b88cedbbc258f1d5edb54f) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Source published

7 Aug 2026 16:30:20 UTC

Source modified

28 Sep 2026 16:45:40 UTC

Observed here

24 Oct 2026 13:17:17 UTC

Source terms

OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.