MAL-2026-10550 Malicious code in better-tailwindcss (npm)
Malicious package
Published
MAL-2026-10550 is a malicious package: better-tailwindcss (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-2026-10550/ (Markdown: https://insights.sbomify.com/MAL-2026-10550/index.md)
- Package
- better-tailwindcss
- Registry
- npm
What is MAL-2026-10550?
MAL-2026-10550 is a malicious package in better-tailwindcss, published on 14 Jul 2026.
Official description
The package publishes under the name of the legitimate
better-tailwindcss project but its package.json declares both a runtime and dev dependency on better-tailwindcss resolved from http://pack.nppacks.com/npm/better-tailwindcss — a plain-HTTP, non-registry host with no integrity hash and no TLS. On npm install, npm fetches and installs that arbitrary, mutable tarball, and any install/postinstall scripts inside it execute on the installer's machine. The shipped code itself is a Babel plugin clone unrelated to the real better-tailwindcss project (a tailwind ESLint plugin) and carries a self-label describing the package as being for 'Security Research Testing Purpose,' confirming it is a namespace squat used as a delivery vehicle for code hosted at pack.nppacks.com.What should I do about MAL-2026-10550?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.
Sources
Also known as GHSA-w8pj-3w7c-464w.