hardhat-lock

Details

**Severity:** Critical

**Affected versions:** `= 2.21.0`

## Source: amazon-inspector (035a099bd6a60e41f1e1cbc1b70f27fecb9bef3f12d54e016d6991b581fc880f)
The npm package [email protected] publishes itself as a logger/middleware but its identity and contents are inconsistent with that purpose: README badges, LICENSE, index.d.ts and docs/* are copied from the unrelated pino project (maintained by pinojs), while the package name squats the Ethereum-tooling keyword 'hardhat'. index.js unconditionally executes require('./lib/config') at module load, and lib/config.js is a ~4MB obfuscator.io-style single-line file (rotated string array of 23,981 entries, hex-escaped tokens, numeric wrapper decoders mt/mw/M0..M5/K/R/s/G, control-flow flattening, and 40,131 inline decoder replacements confirmed by webcrack) whose top-level IIFE runs the moment any downstream code does require('hardhat-lock'). The combination — impersonation of an established package under a different scope-adjacent name, opaque multi-megabyte obfuscated blob with no plausible logging use, and guaranteed import-time execution — is a supply-chain payload carrier: installing and loading the package places attacker-controlled code inside the consumer's Node.js process with unrestricted access to environment variables, filesystem, and network.

---

Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/501714751ba269514a0a7215c211de39b4230b65/osv/malicious/npm/hardhat-lock/MAL-2026-17233.json))

**References:**
- https://github.com/ossf/malicious-packages/blob/501714751ba269514a0a7215c211de39b4230b65/osv/malicious/npm/hardhat-lock/MAL-2026-17233.json
- https://www.npmjs.com/package/hardhat-lock/v/2.21.0
- https://github.com/advisories/GHSA-crqg-xv46-qmmw

Compromised versions (1)

• = 2.21.0

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.