MAL-2026-2004 Malicious code in flyio-token-client-efgh (PyPI)
Malicious package
Published
MAL-2026-2004 is a malicious package: flyio-token-client-efgh (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-2026-2004/ (Markdown: https://insights.sbomify.com/MAL-2026-2004/index.md)
- Package
- flyio-token-client-efgh
- Registry
- PyPI
What is MAL-2026-2004?
MAL-2026-2004 is a malicious package in flyio-token-client-efgh, published on 20 Mar 2026.
Official description
During installation, package attempts to modify LLM configuration files to provide a backdoor instruction for further control over an AI agent.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-03-flyio-token-client-efgh
Reasons (based on the campaign):
llm-threat
The package overrides the install command in setup.py to execute malicious code during installation.
What should I do about MAL-2026-2004?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.