MAL-2026-15912 Malicious code in tailwind-aspect (npm)
Malicious package
Published
MAL-2026-15912 is a malicious package: tailwind-aspect (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-2026-15912/ (Markdown: https://insights.sbomify.com/MAL-2026-15912/index.md)
- Package
- tailwind-aspect
- Registry
- npm
What is MAL-2026-15912?
MAL-2026-15912 is a malicious package in tailwind-aspect, published on 4 Sep 2026.
Official description
The package's main entrypoint unconditionally downloads a JavaScript file from the hardcoded plain-HTTP bare-IP URL http://23.27.245.100/index.js, writes it to./inout.js, and require()s it every time a consumer imports the package. The fetched content is unpinned, unverified, and served over cleartext HTTP, giving the operator of that IP (and any on-path attacker) arbitrary code execution on the installer's machine at import time. The package name and repository metadata impersonate the official @tailwindcss/aspect-ratio plugin (repository points at tailwindlabs/tailwindcss-aspect-ratio), providing cover for the loader; the remote fetch has no relationship to any Tailwind plugin functionality.
What should I do about MAL-2026-15912?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.