tailwind-color-shadesnpm
Advisory published Updated
tailwind-color-shades is a confirmed malicious npm package (MAL-2026-6471) that executes malicious code on install (malicious version 1.0.2). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in tailwind-color-shades (npm)
What this malware does
The package's documented entry point index.ts begins with import './src/bootstrap';, which causes src/bootstrap.js to run whenever the module is required or imported. src/bootstrap.js is a custom string-shuffle obfuscator: a function YWG(x) deterministically unscrambles opaque string literals (e.g. YWG('axhscuutcrogycrneotisjlnkdpfqmzovtrwb').substr(0,11) reconstructs the literal 'constructor'), then uses Function.prototype.constructor to build a Function from one shuffled blob, executes it on a second shuffled blob, and invokes the result via XZs(7942). Before invoking the constructed code the bootstrap explicitly re-exposes Node capabilities to it via global['r']=require; global['m']=module;, granting the dynamically generated payload full filesystem, child_process, and network access. The package's advertised purpose is straightforward Tailwind color-shade math — a few dozen lines of pure arithmetic — so a hand-rolled string-shuffle obfuscator wrapping Function-constructed code at import time has no legitimate purpose. This is the standard supply-chain attack shape: opaque payload, evasion-only obfuscation, automatic execution on consumer import, full Node capability re-export.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for tailwind-color-shades (version 1.0.2).
If you installed it — respond
Remove tailwind-color-shades from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If tailwind-color-shades was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks tailwind-color-shades-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.