Python Pickle Decompiler Vulnerability in Fickling by Trail of Bits

CVE-2026-22606

What is CVE-2026-22606?

Fickling, a Python pickling decompiler and static analyzer, contains a vulnerability that misclassifies potentially malicious pickles due to unsafe handling of Python's runpy module. Versions up to and including 0.1.6 inaccurately label a pickle leveraging runpy.run_path() or runpy.run_module() as SUSPICIOUS instead of OVERTLY_MALICIOUS. This misclassification can mislead users into executing malicious code unknowingly when relying on Fickling's output for safe deserialization. The issue has been addressed in version 0.1.7, highlighting the importance of keeping software updated to mitigate security risks.

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