MAL-2026-15634 Malicious code in tailwind-minanimated (npm)
Malicious package
Published
MAL-2026-15634 is a malicious package: tailwind-minanimated (npm). Every version was published to cause harm.
Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.
Reference: https://insights.sbomify.com/MAL-2026-15634/ (Markdown: https://insights.sbomify.com/MAL-2026-15634/index.md)
- Package
- tailwind-minanimated
- Registry
- npm
What is MAL-2026-15634?
MAL-2026-15634 is a malicious package in tailwind-minanimated, published on 31 Aug 2026.
Official description
src/index.js appends a hidden payload after ~9KB of whitespace padding that decodes and runs via eval(atob(…)) whenever the package is required (the README instructs users to require('tailwind-minanimated') from tailwind.config.js). The payload queries the Ethereum Blockscout API (https://eth.blockscout.com/api) for the latest transaction from hardcoded sender address 0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a, decodes the destination address into two IPv4 addresses, fetches second-stage JavaScript from those hosts at paths /0x/cls and /0x/ls, XOR-decrypts the response with hardcoded keys, and executes the result via eval and a detached spawn('node', ['-e', code], {detached:true, stdio:'ignore'}).unref(). The blockchain-based C2 resolution allows the attacker to rotate infrastructure without republishing the package. The tailwind plugin functionality is a cover for the loader.
What should I do about MAL-2026-15634?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.