animate-css-vitenpm
animate-css-vite is a confirmed malicious npm package (MAL-2026-14226) that executes malicious code on install (malicious version 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in animate-css-vite (npm)
What this malware does
plugin.js contains an RC4/base64 string-array obfuscated function invoked from the exported createPlugin factory. When a consumer's build instantiates the plugin, it constructs a URL at runtime, calls fetch() against it, base64-decodes the response body, and executes the result via new Function(param, decoded)(require) inside a retry loop (up to 10 attempts, 60s timeout each). The obfuscation (130-entry RC4 string array with two indirection decoders and a self-defending console-hook stub) hides the network destination and the fetch/exec wiring; a legitimate PostCSS plugin for vendor prefixes and CSS variables has no reason to fetch and evaluate remote code. The eval runs with require in scope, giving the remote operator arbitrary code execution inside the consumer's build process.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for animate-css-vite (version 1.0.1). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging animate-css-vite across your stack and pipelines.
If you installed it — respond
Remove animate-css-vite from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If animate-css-vite was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks animate-css-vite before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks animate-css-vite-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.