Which versions of tailwind-aspect are malicious?

The following npm versions of tailwind-aspect are flagged malicious: 0.4.2. Treat any of these as compromised.

How do I remediate tailwind-aspect if I installed it?

tailwind-aspect is a typosquat — you almost certainly intended a legitimately-named package. Remove tailwind-aspect, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.

I already installed tailwind-aspect — how do I know if it already compromised me?

If tailwind-aspect 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.

Is tailwind-aspect part of a known attack campaign?

Yes — tailwind-aspect is associated with the IN-MAL-2026-019478 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find tailwind-aspect across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for tailwind-aspect (version 0.4.2).

Malicious package

tailwind-aspectnpm

Advisory published Sep 4, 2026Updated Sep 4, 2026

tailwind-aspect is a confirmed malicious npm package (MAL-2026-15912) that typosquats a legitimate package to trick installs (malicious version 0.4.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in tailwind-aspect (npm)

MAL-2026-15912

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall tailwind-aspect

What this malware does

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.

Malicious versions

1 flagged

0.4.2

Indicators of compromise (SHA-256)

e6ba6037f5f2f65c0ceef0ba5bd8da931b7860a85e7a38fb2703ad4cd7672ddf

Detection & response playbook

Typosquat

Find it
Search your lockfiles and build artifacts for tailwind-aspect (version 0.4.2).
If you installed it — respond
tailwind-aspect is a typosquat — you almost certainly intended a legitimately-named package. Remove tailwind-aspect, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.
Did it already run?
If tailwind-aspect 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

No. tailwind-aspect on npm has been identified as a malicious package (version 0.4.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-019478

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks tailwind-aspect-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.

Malware detection Runtime egress monitoring

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