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OpenAdvisories
Malicious MAL-2026-15912

tailwind-aspect

npm package · versions 0.4.2

Reported Sep 4, 2026 · Updated Sep 4, 2026

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

Source: amazon-inspector (e6ba6037f5f2f65c0ceef0ba5bd8da931b7860a85e7a38fb2703ad4cd7672ddf)
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.