MAL-2026-17636 Malicious code in hardhat-init (npm)

Malicious package Published
Package
hardhat-init
Registry
npm

What is MAL-2026-17636?

MAL-2026-17636 is a malicious package in hardhat-init, published on 6 Oct 2026.

Official description

The npm package hardhat-init presents itself as Hardhat initialization tooling and ships a README, LICENSE, and index.d.ts copied from the pino logger project with the name substituted. The main entry index.js requires./lib/config at the top level, which triggers a ~4.3MB heavily obfuscated JavaScript file (lib/config.js) whose top-level IIFE executes immediately on module load. The obfuscation uses hex-escaped string tables, nested index-lookup helpers, and a string-array shuffler consistent with obfuscator.io output, with no plaintext surface describing the behavior. The exported index.js is a trivial no-op that does not consume anything from lib/config, so the sole effect of loading the package is to execute the opaque payload. The combination of a name/content mismatch (hardhat-init vs. copied pino scaffolding), an oversized obfuscated sibling file with no legitimate purpose for an init helper, and auto-execution on require is a typosquat loader shape that causes arbitrary attacker-controlled code to run on the installer's machine the first time any consumer imports the package.

What should I do about MAL-2026-17636?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

Sources

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