registry / Malware / animatecss-tailwind-helper / 2.0.6

animatecss-tailwind-helper@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-2026-18070 confirms this npm version as malicious.

Advisory

MAL-2026-18070

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in animatecss-tailwind-helper (npm)

Details

animatecss-tailwind-helper (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 @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 source presents a Tailwind CSS generation flow, but it imports and invokes a runtime dependency whose source is unavailable in the package snapshot. Because that selected dependency cannot be assessed, the evidence does not support either a clean verdict or a confirmed attack.

Static reason

No blocking static signals were detected.

Trigger

A consumer runs Tailwind with this plugin configured.

Impact

The helper's behavior cannot be assessed, leaving a runtime code path unresolved.

Mechanism

The plugin builds styles through a helper dependency whose package source could not be read from the snapshot.

AI rationale

Evidence

package.jsonplugin.jssrc/motion.jssrc/styles.js

Independent scan evidence

public snapshot

AI called this Manual Review at 78.0% confidence as Unknown with medium false-positive risk.

AI review observations

The manifest declares the motion helper as a runtime dependency, and its source was unavailable in the snapshot.
The Tailwind plugin calls the style builder during plugin execution; the style builder invokes the motion helper to generate base CSS.

Evidence against

The inspected package entrypoint shows the helper is used as part of a Tailwind CSS plugin flow.

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-helper/",

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

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",

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

35 },

36 "devDependencies": {

High

Suspicious Dependency Evidence

The manifest declares the motion helper as a runtime dependency, and its source was unavailable in the snapshot.

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}

plugin.jsView file

Lines 1-22javascript

1'use strict';

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

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

5const

src/motion.jsView file

Lines 1-21javascript

1'use strict';

3const postcss = require('postcss');

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

5const

src/styles.jsView file

Lines 44-84javascript

45function modifierUtilities(config) {

46 if (!config.modifiers) return {};

47 const prefix = `.${config.prefix}`

Source & flagged code

4 flagged · loading source

package.jsonView file

29"dependencies": { "animate.css": "^4.1.1", "postcss": "^8.4.5", "@jasperquinn/postcss-motion-helpers": "^1.0.1", "postcss-js": "^3.0.3", "postcss-selector-parser": "^6.0.8" }, "

High

Suspicious Dependency Evidence

The manifest declares the motion helper as a runtime dependency, and its source was unavailable in the snapshot.

package.jsonView on unpkg · L29

plugin.jsView file

8function keyframeTailwindPlugin(options = {}) { const config = normalizeOptions(options); return tailwindPlugin(({ addBase, addUtilities }) => { const styles = buildStyles(loadCatalog(), config); addBase(styles.base); addUtilities(styles.utilities); }); } keyframeTailwindPlugin.catalog = () => loadC

High

Ai Review Evidence

The Tailwind plugin calls the style builder during plugin execution; the style builder invokes the motion helper to generate base CSS.

plugin.jsView on unpkg · L8

src/motion.jsView file

Findings

4 High2 Low

HighSuspicious Dependency Evidencepackage.json

HighAi Review Evidenceplugin.js

HighAi Review Evidencesrc/motion.js

HighAi Review Evidencesrc/styles.js

LowScripts Present

LowFilesystem

Affected versions and remediation

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

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

Avoid installing animatecss-tailwind-helper@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 10:15:23.186Z (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