registry / Malware / animate-twcss-bridge

animate-twcss-bridge

A configurable, namespaced Animate.css integration for Tailwind CSS

This report shows the evidence for animate-twcss-bridge@2.0.6, the only known version.

OpenSSF/OSV Malicious Advisory

imported 3d ago · by OpenSSF/OSV

OpenSSF/OSV advisory MAL-2026-18066 confirms this npm version as malicious.

Advisory

MAL-2026-18066

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in animate-twcss-bridge (npm)

Details

animate-twcss-bridge (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 enterprise0908 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 package source implements Tailwind animation style generation and shows no confirmed attack behavior. The source of a required runtime dependency was unavailable, so a clean verdict cannot be established.

Static reason

No blocking static signals were detected.

Trigger

Tailwind invokes the plugin to generate styles.

Impact

The unverified dependency leaves runtime behavior unresolved; no malicious behavior was confirmed.

Mechanism

The plugin calls a dependency whose source was unavailable for inspection.

AI rationale

Evidence

package.jsonplugin.jssrc/motion.jssrc/catalog.js

Independent scan evidence

public snapshot

AI called this Manual Review at 84.0% confidence as Unknown with medium false-positive risk.

AI review observations

The manifest declares the animation utility as a runtime dependency, and the plugin calls its style-building path when Tailwind invokes the plugin.
The motion module imports and invokes that utility to generate CSS variables; its source could not be verified in the available dependency snapshot.

Evidence against

The package entrypoint builds Tailwind base styles and utilities from animation data, with no install lifecycle scripts in the inspected manifest.

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/animate-twcss-bridge/",

14 "repository": "https://github.com/sericpieap/animate-twcss-bridge/",

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 the animation utility as a runtime dependency, and the plugin calls its style-building path when Tailwind invokes the plugin.

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/catalog.jsView file

Lines 6-46javascript

7let cachedCatalog;

9function animateCssPath() {

10 try {

11 return require.resolve('animate.css/animate.css');

12 } catch (error) {

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" }, "devDep

High

Suspicious Dependency Evidence

The manifest declares the animation utility as a runtime dependency, and the plugin calls its style-building path when Tailwind invokes the plugin.

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 = () => loadCatalog().names.slice(); keyframeTailwindPlugin.normalizeOptions = nor

High

Suspicious Dependency Evidence

The manifest declares the animation utility as a runtime dependency, and the plugin calls its style-building path when Tailwind invokes the plugin.

plugin.jsView on unpkg · L8

Findings

4 High2 Low

HighSuspicious Dependency Evidencepackage.json

HighSuspicious Dependency Evidenceplugin.js

HighSuspicious Dependency Evidencesrc/motion.js

HighSuspicious Dependency Evidencesrc/catalog.js

LowScripts Present

LowFilesystem

Affected versions and remediation

This report applies to animate-twcss-bridge@2.0.6.

The versions list below shows the verdict for each recorded version.

Avoid installing animate-twcss-bridge@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 10:15:47.208Z (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.

Versions

1 known version

2.0.6latestshownMaliciousMalwareBlockPublishedSep 28, 2026, 9:46 AM

OpenSSF/OSV Malicious Advisory

Independent LPM AI assessment

Independent scan evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Versions

Related packages

Other malware packages

Behavioral surface

Related packages

Other malware packages

Source & flagged code