# MAL-2026-13604: Malicious code in tailwindcss-motion-advanced (npm)


- **Type:** Malicious package
- **Package:** `tailwindcss-motion-advanced` (npm)
- **Published:** 7 Aug 2026

## What is MAL-2026-13604?

MAL-2026-13604 is a malicious package in tailwindcss-motion-advanced, published on 7 Aug 2026. 

### Official description

On require of the package's main entry, lib/utils.min.js queries Ethereum RPC endpoints (eth.blockscout.com/api, 1rpc.io/eth, eth.drpc.org, ethereum-rpc.publicnode.com, eth-mainnet.public.blastapi.io) for the latest outbound transaction from the hardcoded address 0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a, parses two IPv4 C2 hosts from the transaction's `to` field, fetches an XOR-encoded JavaScript payload over plain HTTP at `http://<ip>:443/0x/cls`, decodes it, and executes it via both `eval` and a detached `spawn('node', ['-e', payload])`. Sensitive identifiers (`http`, `https`, `child_process`, `zlib`, `url`, URLs, HTTP methods, header names, the attacker address) are hidden behind \uXXXX unicode escapes, and the response body and `x-payload-b64` header are XOR-decoded with a per-URL key before execution. The package is presented as a Tailwind CSS plugin and has no legitimate need for Ethereum RPC access, IP derivation from on-chain data, or execution of remotely fetched code.

## What should I do about MAL-2026-13604?

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-2026-13604 is a malicious package: tailwindcss-motion-advanced (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-2026-13604/ (Markdown: https://insights.sbomify.com/MAL-2026-13604/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13604

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13604/
Summaries are generated and may contain mistakes; the official description above is the record.