Which versions of tailwindcss-contact-form are malicious?

The following npm versions of tailwindcss-contact-form are flagged malicious: 0.5.1. Treat any of these as compromised.

How do I remediate tailwindcss-contact-form if I installed it?

tailwindcss-contact-form establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.

I already installed tailwindcss-contact-form — how do I know if it already compromised me?

If tailwindcss-contact-form 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 tailwindcss-contact-form part of a known attack campaign?

Yes — tailwindcss-contact-form is associated with the IN-MAL-2026-020120 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 tailwindcss-contact-form across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for tailwindcss-contact-form (version 0.5.1).

Malicious package

tailwindcss-contact-formnpm

Advisory published Sep 17, 2026Updated Sep 17, 2026

tailwindcss-contact-form is a confirmed malicious npm package (MAL-2026-16251) that opens a backdoor for remote access (malicious version 0.5.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in tailwindcss-contact-form (npm)

MAL-2026-16251

Immediate action

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

npm uninstall tailwindcss-contact-form

What this malware does

Package presents itself as the Tailwind CSS forms plugin (README is a verbatim copy of @tailwindcss/forms and its package.json points at github.com/tailwindlabs/tailwindcss-forms), and the README instructs users to require('tailwindcss-contact-form') from their tailwind.config.js. The single main file src/index.js is heavily obfuscated (obfuscator.io-style rotated string array, hex identifiers, control-flow flattening) and, when required, imports node:http/node:https and spawn from node:child_process, queries public Ethereum RPCs (eth.drpc.org, ethereum-rpc.publicnode.com, 1rpc.io/eth, public.blastapi.io) and the Blockscout txlist API for outbound transactions of the hardcoded address 0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a, extracts a base64 payload from transaction data (x-payload-B64), and executes it by spawning node. This is a remote-code-execution loader using the Ethereum blockchain as a command-and-control channel: whoever controls the hardcoded key controls code execution on every machine that imports the package. The Tailwind-forms cover story, verbatim README, and forged repository link exist to trick developers into wiring the require() into their build config.

Malicious versions

1 flagged

0.5.1

Indicators of compromise (SHA-256)

0b198bc6d5af472f9cb1f1db25acf0215b77c04a742fcce81fef5565d76d837b

Detection & response playbook

Backdoor / remote access

Find it
Search your lockfiles and build artifacts for tailwindcss-contact-form (version 0.5.1).
If you installed it — respond
tailwindcss-contact-form establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.
Did it already run?
If tailwindcss-contact-form 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. tailwindcss-contact-form on npm has been identified as a malicious package (version 0.5.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-020120

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks tailwindcss-contact-form-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.

Malware detection Runtime egress monitoring

Explore

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