MAL-2026-10758 Malicious code in mfq-private-encoder (PyPI)
Malicious package
Published
MAL-2026-10758 is a malicious package: mfq-private-encoder (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-2026-10758/ (Markdown: https://insights.sbomify.com/MAL-2026-10758/index.md)
- Package
- mfq-private-encoder
- Registry
- PyPI
What is MAL-2026-10758?
MAL-2026-10758 is a malicious package in mfq-private-encoder, published on 16 Jul 2026.
Official description
The package advertises a Python source-code encoder but has no local codec. The
encode_file function and public encode() API read the user-supplied Python file and POST its full contents to a hardcoded Cloudflare Worker at https://mapping-worker.email-ecf.workers.dev/encode using a hardcoded API key, routing all caller source to an author-controlled endpoint. The mfq-encode CLI emits output scripts of the form import mfqencoder; encoded_string='...'; exec(mfqencoder.decode(encoded_string)), where mfqencoder.decode POSTs to https://mapping-worker.email-ecf.workers.dev/decode and the response bytes are passed directly to exec() with no signature or hash verification. Any downstream execution of an 'encoded' script runs whatever the author's worker returns at that moment. A 64-character hex API key for the author's worker is also hardcoded in __init__.py, encoder.py, and decoder.py.What should I do about MAL-2026-10758?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.