AIKIDO-2026-33194
anyconfig is vulnerable to Deserialization of Untrusted Data
84
High Risk
This Affects:
anyconfigTL;DR
anyconfig selects a backend parser from a file's extension when no explicit parser is passed to load, loads, or open. The default backends include a pickle parser registered for the .pkl and .pickle extensions that deserializes input with pickle.load and pickle.loads. Loading a file whose path or extension is influenced by untrusted input routes to pickle deserialization and can execute arbitrary code. The fix removes and unregisters the pickle backend so extension-based auto-detection can no longer reach a code-executing deserializer.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and your application loads a file whose name or extension can be influenced by untrusted input.
Background info
anyconfig is vulnerable to Deserialization of Untrusted Data in versions 0.0.1 - 0.15.1.
How to fix this
Upgrade the anyconfig library to the patch version.
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