MAL-2026-1436 Malicious code in do-not-install-this-package-004 (PyPI)
Malicious package
Published
MAL-2026-1436 is a malicious package: do-not-install-this-package-004 (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-2026-1436/ (Markdown: https://insights.sbomify.com/MAL-2026-1436/index.md)
- Package
- do-not-install-this-package-004
- Registry
- PyPI
What is MAL-2026-1436?
MAL-2026-1436 is a malicious package in do-not-install-this-package-004, published on 15 Mar 2026.
Official description
During installation, the package exfiltrates env variables and data from different process memory to a remote location
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-01-do-not-install-this-package-002
Reasons (based on the campaign):
exfiltration-generic
exfiltration-credentials
exfiltration-env-variables
The package overrides the install command in setup.py to execute malicious code during installation.
What should I do about MAL-2026-1436?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.