# MAL-2025-40927: Malicious code in zephyr_up67l_u4nhw_thunder (npm)


- **Type:** Malicious package
- **Package:** `zephyr_up67l_u4nhw_thunder` (npm)
- **Published:** 14 Aug 2025

## What is MAL-2025-40927?

MAL-2025-40927 is a malicious package in zephyr_up67l_u4nhw_thunder, published on 14 Aug 2025. 

### Official description

The package zephyr_up67l_u4nhw_thunder was found to contain malicious code.

## What should I do about MAL-2025-40927?

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-2025-40927 is a malicious package: zephyr_up67l_u4nhw_thunder (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-2025-40927/ (Markdown: https://insights.sbomify.com/MAL-2025-40927/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2025-40927

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From sbomify Insights: https://insights.sbomify.com/MAL-2025-40927/
Summaries are generated and may contain mistakes; the official description above is the record.