# MAL-2026-2899: Malicious code in chai-use-chains (npm)


- **Type:** Malicious package
- **Package:** `chai-use-chains` (npm)
- **Published:** 15 Apr 2026
- **Also known as:** GHSA-x74q-vqg8-cc8f

## What is MAL-2026-2899?

MAL-2026-2899 is a malicious package in chai-use-chains, published on 15 Apr 2026. 

### Official description

chai-use-chains is a malicious npm package that when imported downloads a C2 dropper from https://jsonkeeper[.]com/b/FAWPU and executes it (similar to malware in to chai-await-test).

The package chai-use-chains was found to contain malicious code.

## What should I do about MAL-2026-2899?

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-2026-2899 is a malicious package: chai-use-chains (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-2026-2899/ (Markdown: https://insights.sbomify.com/MAL-2026-2899/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-2899

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-2899/
Summaries are generated and may contain mistakes; the official description above is the record.