Which versions of tailwindcss-form-ui are malicious?

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

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

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

If tailwindcss-form-ui was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

Is tailwindcss-form-ui part of a known attack campaign?

Yes — tailwindcss-form-ui is associated with the IN-MAL-2026-020139 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-form-ui across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for tailwindcss-form-ui (version 0.5.1). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging tailwindcss-form-ui across your stack and pipelines.

Malicious package

tailwindcss-form-uinpm

tailwindcss-form-ui is a confirmed malicious npm package (MAL-2026-16262) 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-form-ui (npm)

MAL-2026-16262

Immediate action

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

npm uninstall tailwindcss-form-ui

What this malware does

Package name and repository field impersonate the legitimate tailwindlabs/tailwindcss-forms plugin, but the shipped main entry src/index.js is a fully obfuscated (obfuscator.io string-array) module that has nothing to do with Tailwind CSS. On module load it imports node:child_process (spawn), node:http/https, node:zlib and node:url, builds a list of Ethereum JSON-RPC endpoints (process.env.ETH_RPC_URL, *.publicnode.com, drpc.org, 1rpc.io/eth, blockscout) and an Etherscan-style txlist URL for the hardcoded sender address 0xa322E5f39aDC2490EfD311D3080e6f0121063e1a, and polls eth_blockNumber / eth_getBlockByNumber / eth_getTransactionCount to retrieve attacker-published transactions. The retrieved payloads are decompressed via gunzip/inflate/brotli and passed to child_process.spawn, giving whoever controls that Ethereum address arbitrary command execution on any host that requires or imports the package. The on-chain command channel is takedown-resistant. The Tailwind-forms identity, the obfuscated main, and the require-time RCE together form a cover-story typosquat delivering installer-side remote code execution.

Malicious versions

1 flagged

0.5.1

Indicators of compromise (SHA-256)

c7a21e4623006a0c69e3dfeb80857eadd9102550c8a77c1d95e880245a5f0fa9

Detection & response playbook

Backdoor / remote access

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for tailwindcss-form-ui (version 0.5.1). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging tailwindcss-form-ui across your stack and pipelines.
If you installed it — respond
tailwindcss-form-ui 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-form-ui was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks tailwindcss-form-ui before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. tailwindcss-form-ui 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-2026-020139

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks tailwindcss-form-ui-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

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