# MAL-2026-6751: Malicious code in bytekit (PyPI)


- **Type:** Malicious package
- **Package:** `bytekit` (PyPI)
- **Published:** 3 Jul 2026

## What is MAL-2026-6751?

MAL-2026-6751 is a malicious package in bytekit, published on 3 Jul 2026. 

### Official description

The package was found to contain malicious code or consuming dependency that contains malicious code

The campaign consists of multiple packages. The trigger sits in the package 'procwire,' which depends on two others. During installation, procwire uses schemavault and bytekit packages. The first one holds the URL holding malware (in two places, once as steganography in the bundled image and once as a fallback just as a list of encoded bytes). The bytekit implements simple custom decoding used to retrieve back the URL in the fallback method. Additionally, procwire is also a dependency of confighub, turning another package into malware. The downloaded executable is run and quickly removed. The executable likely contains an infostealer and contacts the domain 030502[.]xyz

---

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

Campaign: 2026-07-procwire

Reasons (based on the campaign):

 - The package overrides the install command in setup.py to execute malicious code during installation.

 - Downloads and executes a remote executable.

 - obfuscation

 - The malicious code is intentionally included in a dependency of the package

 - malware

 - steganography

## What should I do about MAL-2026-6751?

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-2026-6751 is a malicious package: bytekit (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-2026-6751/ (Markdown: https://insights.sbomify.com/MAL-2026-6751/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6751

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-6751/
Summaries are generated and may contain mistakes; the official description above is the record.