Which versions of tailwindcss-effect-lab are malicious?

The following npm versions of tailwindcss-effect-lab are flagged malicious: 0.0.0-stage, 1.6.7. Treat any of these as compromised.

How do I remediate tailwindcss-effect-lab if I installed it?

tailwindcss-effect-lab is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed tailwindcss-effect-lab — how do I know if it already compromised me?

If tailwindcss-effect-lab 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.

How do I find tailwindcss-effect-lab across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for tailwindcss-effect-lab (2 malicious versions).

Malicious package

tailwindcss-effect-labnpm

Advisory published Oct 19, 2026Updated Oct 20, 2026

tailwindcss-effect-lab is a confirmed malicious npm package (MAL-2026-18087) that steals credentials and exfiltrates sensitive data (malicious versions 0.0.0-stage, 1.6.7). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in tailwindcss-effect-lab (npm)

MAL-2026-18087

Immediate action

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

npm uninstall tailwindcss-effect-lab

What this malware does

tailwindcss-effect-lab (0.0.0-stage, 1.6.7) is a Tailwind CSS plugin from the fake job interview campaign behind MAL-2026-17665 and MAL-2026-17666: the same Animate.css integration template, README and description, published by johnsmith0821 on 2026-10-09. src/motion.js:5 requires the private scoped package @aaron205whitmore/postcss-animate-utils, which is not readable on the public registry and resolves only with the npm token committed in the lure repository's web/.npmrc, so the code it delivers runs when tailwind.config.js loads the plugin and the dev server starts. The published tarball contains no install scripts and no network code; the payload lives in the private dependency, which was not retrieved. Twenty-six such packages under seventeen accounts were published between 2026-07-28 and 2026-10-09.

Malicious versions

2 flagged

0.0.0-stage1.6.7

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for tailwindcss-effect-lab (2 malicious versions).
If you installed it — respond
tailwindcss-effect-lab is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If tailwindcss-effect-lab 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-effect-lab on npm has been identified as a malicious package (versions 0.0.0-stage, 1.6.7 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

References

Credits

pkgwarden · finder

Detect & block this

O3 blocks tailwindcss-effect-lab-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

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