# MAL-2026-13756: Malicious code in joule-sbx-poc (PyPI)


- **Type:** Malicious package
- **Package:** `joule-sbx-poc` (PyPI)
- **Published:** 11 Aug 2026

## What is MAL-2026-13756?

MAL-2026-13756 is a malicious package in joule-sbx-poc, published on 11 Aug 2026. 

### Official description

During installation, the code exfiltrates basic information and exfiltrates more information to a localhost service as well as starts a reverse shell there. It seems to be an internal test that was uploaded to a public repository.

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Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: 2026-08-joule-btp-extension

Reasons (based on the campaign):

 - The package contains code to create a reverse shell, allowing an attacker to execute any commands on the victim's machine.

 - 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-2026-13756?

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-2026-13756 is a malicious package: joule-sbx-poc (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-2026-13756/ (Markdown: https://insights.sbomify.com/MAL-2026-13756/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13756

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13756/
Summaries are generated and may contain mistakes; the official description above is the record.