# MAL-2026-7020: Malicious code in react-v17 (npm)


- **Type:** Malicious package
- **Package:** `react-v17` (npm)
- **Published:** 8 Jul 2026

## What is MAL-2026-7020?

MAL-2026-7020 is a malicious package in react-v17, published on 8 Jul 2026. 

### Official description

Package name 'react-v17' impersonates the legitimate 'react' package. package.json declares a preinstall hook 'node index.js' that auto-executes on npm install. index.js collects installer identity and host details (os.hostname(), os.userInfo(), os.platform/arch, home directory, cwd) and runs 'whoami' and 'id' via child_process.exec, then HTTPS POSTs the aggregate JSON to a hardcoded Burp Collaborator OOB endpoint at https://1jlay7gzya8akcmqs8repdf7oyupim6b.oastify.com/detox56. The tarball also ships an undeclared ~10.9 KB file 'i' next to index.js that is not referenced by package.json or index.js.

## What should I do about MAL-2026-7020?

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-2026-7020 is a malicious package: react-v17 (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-2026-7020/ (Markdown: https://insights.sbomify.com/MAL-2026-7020/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-7020

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-7020/
Summaries are generated and may contain mistakes; the official description above is the record.