Security Flaw in Fickling Python Decompiler from Trail of Bits

CVE-2026-22607

What is CVE-2026-22607?

Fickling, a Python pickling decompiler and static analysis tool, is susceptible to a misclassification vulnerability involving the cProfile module. Versions up to 0.1.6 incorrectly classify malicious pickles that use cProfile.run() as SUSPICIOUS instead of OVERTLY_MALICIOUS. This flaw can mislead users relying on Fickling's analysis when determining the safety of deserializing pickled data, thus potentially allowing execution of attacker-controlled code. The issue has been resolved in version 0.1.7.

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