MAL-2026-3829 Malicious code in pyenvprep (PyPI)
Malicious package
Published
MAL-2026-3829 is a malicious package: pyenvprep (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-2026-3829/ (Markdown: https://insights.sbomify.com/MAL-2026-3829/index.md)
- Package
- pyenvprep
- Registry
- PyPI
What is MAL-2026-3829?
MAL-2026-3829 is a malicious package in pyenvprep, published on 18 May 2026.
Official description
Package contains code to silently execute a RAT-like agent, allowing the attacker to access the file system and execute arbitrary code.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-05-venv-utils
Reasons (based on the campaign):
rat
typosquatting
The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine.
obfuscation
What should I do about MAL-2026-3829?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.