# MAL-2026-1289: Malicious code in aioutil3 (PyPI)


- **Type:** Malicious package
- **Package:** `aioutil3` (PyPI)
- **Published:** 8 Mar 2026

## What is MAL-2026-1289?

MAL-2026-1289 is a malicious package in aioutil3, published on 8 Mar 2026. 

### Official description

This is a malicious clone of legitimate python-utils. The modified code introduces a function that silently exfiltrates given data to a hardcoded location. What is interesting, during the analysis the remote domain did not exist and the malicious code was not called in the package, suggesting preparation for the further attack.

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Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-03-aioutil3

Reasons (based on the campaign):

 - clones-real-package

 - The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.

## What should I do about MAL-2026-1289?

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-2026-1289 is a malicious package: aioutil3 (PyPI). 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-2026-1289/ (Markdown: https://insights.sbomify.com/MAL-2026-1289/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-1289

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-1289/
Summaries are generated and may contain mistakes; the official description above is the record.