registry / Malware / tailwind-animatecss-kit / 2.0.6

tailwind-animatecss-kit@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-2026-18079 confirms this npm version as malicious.

Advisory

MAL-2026-18079

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in tailwind-animatecss-kit (npm)

Details

tailwind-animatecss-kit (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 killerdev1127 on 2026-09-28. src/motion.js:5 requires the private scoped package @jasperquinn/postcss-motion-helpers, 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 package source shows a Tailwind animation plugin and no install lifecycle hook. Its required PostCSS helper dependency could not be verified, and that helper runs in the style-building path, so the source review cannot establish a clean verdict.

Static reason

No blocking static signals were detected.

Trigger

Using the Tailwind plugin to build its styles.

Impact

The helper’s runtime effects cannot be determined from the inspected source.

Mechanism

The style builder invokes an imported PostCSS helper whose package source was unavailable in the supplied dependency inspection.

AI rationale

Evidence

package.jsonsrc/motion.jssrc/styles.jsplugin.js

Independent scan evidence

public snapshot

AI called this Manual Review at 88.0% confidence as Unknown with medium false-positive risk.

AI review observations

The manifest declares the required helper dependency, but its source was unavailable for inspection.
The package imports and invokes that helper while building its PostCSS motion plugin, so its runtime behavior remains unresolved.
The plugin reaches this helper through its style-building path.

Evidence against

The manifest lists only lint and test scripts; no install lifecycle script is declared.

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

5 flagged

package.jsonView file

Lines 12-49json

12 ],

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

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

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 "@jasperquinn/postcss-motion-helpers": "^1.0.1",

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

High

Suspicious Dependency Evidence

The manifest declares the required helper dependency, but its source was unavailable for inspection.

package.jsonView on unpkg · L32

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

35 },

36 "devDependencies": {

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

src/styles.jsView file

Lines 1-25javascript

1'use strict';

3const postcss = require('postcss');

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

5const {

Source & flagged code

5 flagged · loading source

package.jsonView file

32"@jasperquinn/postcss-motion-helpers": "^1.0.1", "postcss-js": "^

High

Suspicious Dependency Evidence

The manifest declares the required helper dependency, but its source was unavailable for inspection.

package.jsonView on unpkg · L32

src/motion.jsView file

5const postcssAnimateUtils = require('@jasperquinn/postcss-motion-helpers'); function toPostcssOpt

High

Suspicious Dependency Evidence

The manifest declares the required helper dependency, but its source was unavailable for inspection.

src/motion.jsView on unpkg · L5

28const processor = postcss([postcssAnimateUtils(toPostcssOptions(config))]); const result = processor.process('', { from

High

Ai Review Evidence

The package imports and invokes that helper while building its PostCSS motion plugin, so its runtime behavior remains unresolved.

Findings

5 High2 Low

HighSuspicious Dependency Evidencepackage.json

HighSuspicious Dependency Evidencesrc/motion.js

HighAi Review Evidencesrc/motion.js

HighAi Review Evidenceplugin.js

HighAi Review Evidencesrc/styles.js

LowScripts Present

LowFilesystem

Affected versions and remediation

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

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

Avoid installing tailwind-animatecss-kit@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 10:16:45.563Z (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