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High · 8.9 CVE-2026-22607 EUVD-2026-1687GHSA-p523-jq9w-64x9PYSEC-2026-1371

Fickling Blocklist Bypass: cProfile.run()

Published Jan 10, 2026 · Updated Jan 13, 2026 · Assigned by GitHub_M

Description

Fickling is a Python pickling decompiler and static analyzer. Fickling versions up to and including 0.1.6 do not treat Python's cProfile module as unsafe. Because of this, a malicious pickle that uses cProfile.run() is classified as SUSPICIOUS instead of OVERTLY_MALICIOUS. If a user relies on Fickling's output to decide whether a pickle is safe to deserialize, this misclassification can lead them to execute attacker-controlled code on their system. This affects any workflow or product that uses Fickling as a security gate for pickle deserialization. This issue has been patched in version 0.1.7.

Affected products

VendorProductAffectedFixed
trailofbits fickling < 0.1.7 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI fickling < 0.1.7 0.1.7 GHSA-p523-jq9w-64x9

References