# MAL-2026-6131: Malicious code in computerrock-babel-preset-react-app (npm)


- **Type:** Malicious package
- **Package:** `computerrock-babel-preset-react-app` (npm)
- **Published:** 18 Jun 2026

## What is MAL-2026-6131?

MAL-2026-6131 is a malicious package in computerrock-babel-preset-react-app, published on 18 Jun 2026. 

### Official description

The package impersonates the well-known babel-preset-react-app under a fake org-style prefix and ships no Babel preset code. package.json declares "preinstall": "node index.js", which runs automatically on npm install. index.js collects hostname, platform, arch, homedir, username/uid/gid/shell, OS info, current working directory, and the output of `whoami` and `id`, then POSTs the JSON payload to a hardcoded https://0bccssrkeubggq24k750nrw0erki88wx.oastify.com/detox56 URL (a Burp Collaborator out-of-band exfiltration host). The package's only function is reconnaissance and exfiltration of installer-side identifiers to an attacker-controlled host.

## What should I do about MAL-2026-6131?

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-2026-6131 is a malicious package: computerrock-babel-preset-react-app (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-2026-6131/ (Markdown: https://insights.sbomify.com/MAL-2026-6131/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6131

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-6131/
Summaries are generated and may contain mistakes; the official description above is the record.