# MAL-2026-11487: Malicious code in tailwindcss-anim (npm)


- **Type:** Malicious package
- **Package:** `tailwindcss-anim` (npm)
- **Published:** 2 Aug 2026
- **Also known as:** GHSA-m326-xg22-g2fx

## What is MAL-2026-11487?

MAL-2026-11487 is a malicious package in tailwindcss-anim, published on 2 Aug 2026. 

### Official description

index.js hides a base64-encoded payload after a long run of tab characters and executes it via eval(atob(...)) at module load, so any require()/import of the package triggers the dropper. The decoded payload queries Ethereum JSON-RPC endpoints (eth.blockscout.com/api, eth.drpc.org, ethereum-rpc.publicnode.com, eth-mainnet.public.blastapi.io) for the latest transaction from the hardcoded address 0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a, extracts two IPv4 addresses from the transaction's `to` field bytes, HTTP-fetches an XOR-obfuscated stage-2 from those IPs, and runs it via eval and spawn("node", ["-e", payload], {detached:true, stdio:"ignore", windowsHide:true}).unref(). Sensitive identifiers (http, https, child_process, spawn, x-payload-b64) are written as \u-escaped sequences to evade text search. The blockchain-derived indirection lets the operator rotate stage-2 hosts by broadcasting a new transaction from the watched address, giving a resilient, mutable control channel for arbitrary code execution on the installer host. The package is presented as a Tailwind CSS animation plugin, which is unrelated to any of this behavior.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

## What should I do about MAL-2026-11487?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

## Fix prompt for AI coding agents

```text
MAL-2026-11487 is a malicious package: tailwindcss-anim (npm). Every version was published to cause harm.

Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.

Reference: https://insights.sbomify.com/MAL-2026-11487/ (Markdown: https://insights.sbomify.com/MAL-2026-11487/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-11487

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-11487/
Summaries are generated and may contain mistakes; the official description above is the record.