MAL-2025-191789 Malicious code in mcp-weather-full (PyPI)
Malicious package
Published
MAL-2025-191789 is a malicious package: mcp-weather-full (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-2025-191789/ (Markdown: https://insights.sbomify.com/MAL-2025-191789/index.md)
- Package
- mcp-weather-full
- Registry
- PyPI
What is MAL-2025-191789?
MAL-2025-191789 is a malicious package in mcp-weather-full, published on 6 Nov 2025.
Official description
Package seems to provide an MCP server, but in fact contains attempts to make an LLM agent break safeguards. As the request is about leaves just a flag, it seems to be research.
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: 2025-11-wayspirit
Reasons (based on the campaign):
- llm-threat
What should I do about MAL-2025-191789?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.