# MAL-2025-192391: Malicious code in bignum (PyPI)


- **Type:** Malicious package
- **Package:** `bignum` (PyPI)
- **Published:** 9 Dec 2025

## What is MAL-2025-192391?

MAL-2025-192391 is a malicious package in bignum, published on 9 Dec 2025. 

### Official description

In this incarnation, the package is no longer a clone of networkx, but continues to use the same technique to run secretly remote code and cover tracks

---

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

Campaign: 2025-12-graphnode

Reasons (based on the campaign):

 - obfuscation

 - Downloads and executes a remote malicious script.

 - clones-real-package

## What should I do about MAL-2025-192391?

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-2025-192391 is a malicious package: bignum (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-2025-192391/ (Markdown: https://insights.sbomify.com/MAL-2025-192391/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2025-192391

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From sbomify Insights: https://insights.sbomify.com/MAL-2025-192391/
Summaries are generated and may contain mistakes; the official description above is the record.