CVE-2026-22607

Fickling Blocklist Bypass: cProfile.run()

State: Published
Severity: 8.9 High
Published: Jan 10, 2026
Updated: Jan 13, 2026
Reserved: Jan 7, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.9 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P	GitHub_M

Weaknesses

CWE-184 Incomplete List of Disallowed Inputs
CWE-502 Deserialization of Untrusted Data

Affected Products

Product	Versions
ficklingtrailofbits	< 0.1.7Affected

References

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