# MAL-2026-2255: Malicious code in thisismytest123 (PyPI)


- **Type:** Malicious package
- **Package:** `thisismytest123` (PyPI)
- **Published:** 27 Mar 2026

## What is MAL-2026-2255?

MAL-2026-2255 is a malicious package in thisismytest123, published on 27 Mar 2026. 

### Official description

During installation, if run under a specific username, the package downloads and installs two executables identified as backdoors trojans.

---

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

Campaign: 2026-03-thisismytest123

Reasons (based on the campaign):

 - Downloads and executes a remote executable.

 - backdoor

 - malware

The OpenSSF Package Analysis project identified 'thisismytest123' @ 1.0.0 (pypi) as malicious.

It is considered malicious because:

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

## What should I do about MAL-2026-2255?

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-2026-2255 is a malicious package: thisismytest123 (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-2026-2255/ (Markdown: https://insights.sbomify.com/MAL-2026-2255/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-2255

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-2255/
Summaries are generated and may contain mistakes; the official description above is the record.