registry / Malware / animatecss-tailwind-plugin / 2.0.6

animatecss-tailwind-plugin@2.0.6

A configurable, namespaced Animate.css integration for Tailwind CSS

OpenSSF/OSV Malicious Advisory

imported 3d ago · by OpenSSF/OSV

OpenSSF/OSV advisory MAL-2026-18072 confirms this npm version as malicious.

Advisory

MAL-2026-18072

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in animatecss-tailwind-plugin (npm)

Details

animatecss-tailwind-plugin (2.0.6) 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 hannahgibbs on 2026-09-28. 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.

References

OpenSSF/OSV advisory ADVISORY ADVISORY ADVISORY WEB

Independent LPM AI assessment

Manual Review

Independent AI assessment: manual_review. LPM AI review remains unresolved.

The inspected code constructs Tailwind styles from Animate.css and invokes a declared PostCSS utility dependency. That dependency's source was unavailable in the supplied snapshot, so its behavior cannot be verified; the evidence does not establish maliciousness.

Static reason

No blocking static signals were detected.

Trigger

Importing the plugin loads its styles module; building styles invokes the unresolved dependency.

Impact

No harmful effect is established; the dependency's behavior cannot be assessed from this source snapshot.

Mechanism

The dependency is passed to PostCSS as a plugin, but its implementation was unavailable for inspection.

AI rationale

Evidence

src/motion.jsplugin.jspackage.json

Independent scan evidence

public snapshot

AI called this Manual Review at 82.0% confidence as Unknown with medium false-positive risk.

AI review observations

The manifest declares @aaron205whitmore/postcss-animate-utils as a runtime dependency.
The plugin imports its styles module, which imports and invokes that dependency while building styles.

Evidence against

The inspected package source shows CSS processing and Tailwind style generation; it does not establish a malicious action.

Behavioral surface

Source

Filesystem

Supply chainNo supply-chain packaging signals triggered.

ManifestNo manifest risk signals triggered.

scanned 5 file(s), 10.2 KB of source

Source & flagged code

4 flagged

package.jsonView file

Lines 9-49json

9 "src",

10 "README.md",

11 "LICENSE"

12 ],

13 "homepage": "https://sericpieap.github.io/animatecss-tailwind-plugin/",

14 "repository": "https://github.com/sericpieap/animatecss-tailwind-plugin/",

15 "author": "sericpieap",

16 "license": "MIT",

17 "keywords": [

18 "tailwindcss",

19 "tailwindcss-plugin",

20 "animate.css",

21 "animation",

22 "keyframes",

23 "motion"

24 ],

25 "scripts": {

26 "lint": "eslint . --ext .js",

27 "test": "node --test"

28 },

29 "dependencies": {

30 "animate.css": "^4.1.1",

31 "postcss": "^8.4.5",

32 "@aaron205whitmore/postcss-animate-utils": "^1.0.1",

33 "postcss-js": "^3.0.3",

34 "postcss-selector-parser": "^6.0.8"

35 },

36 "devDependencies": {

High

Suspicious Dependency Evidence

The manifest declares @aaron205whitmore/postcss-animate-utils as a runtime dependency.

package.jsonView on unpkg · L29

37 "eslint": "^8.5.0",

38 "eslint-config-airbnb-base": "15.0.0",

39 "eslint-plugin-import": "^2.25.2",

40 "tailwindcss": "^3.0.7"

41 },

42 "peerDependencies": {

43 "tailwindcss": "^3"

44 },

45 "engines": {

46 "node": ">=18"

47 }

48}

src/motion.jsView file

Lines 1-34javascript

1'use strict';

3const postcss = require('postcss');

4const postcssJs = require('postcss-js');

5const

plugin.jsView file

Lines 1-22javascript

1'use strict';

3const tailwindPlugin = require('tailwindcss/plugin');

4const { loadCatalog } = require('./src/catalog');

5const

Source & flagged code

4 flagged · loading source

package.jsonView file

29"dependencies": { "animate.css": "^4.1.1", "postcss": "^8.4.5", "@aaron205whitmore/postcss-animate-utils": "^1.0.1", "postcss-js": "^3.0.3", "postcss-selector-parser": "^6.0.8" }, "devDependenc

High

Suspicious Dependency Evidence

The manifest declares @aaron205whitmore/postcss-animate-utils as a runtime dependency.

package.jsonView on unpkg · L29

src/motion.jsView file

5const postcssAnimateUtils = require('@aaron205whitmore/postcss-animate-utils'); function toPostcssOptions(config) { return { variables:

High

Suspicious Dependency Evidence

The manifest declares @aaron205whitmore/postcss-animate-utils as a runtime dependency.

src/motion.jsView on unpkg · L5

28const processor = postcss([postcssAnimateUtils(toPostcssOptions(config))]); const result = processor.process('', { from: undefined }).sync(); return postcssJs

High

Findings

4 High2 Low

HighSuspicious Dependency Evidencepackage.json

HighSuspicious Dependency Evidencesrc/motion.js

HighSuspicious Dependency Evidenceplugin.js

LowScripts Present

LowFilesystem

Affected versions and remediation

This report applies to animatecss-tailwind-plugin@2.0.6.

See all versions of animatecss-tailwind-plugin for other recorded verdicts.

Avoid installing animatecss-tailwind-plugin@2.0.6. Remove it from direct dependencies and check your lockfile for transitive copies.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.
If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.

Evidence last updated: 2026-10-20 10:14:52.172Z (UTC).

Source advisory published: 2026-10-19 00:00:00.000Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

OpenSSF/OSV Malicious Advisory

Independent LPM AI assessment

Independent scan evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Related packages

Other malware packages

Behavioral surface

Source & flagged code

Related packages

Other malware packages