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.

Subscriptions

Vendors Products
Trailofbits Subscribe
Fickling Subscribe

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
Github GHSA Github GHSA GHSA-p523-jq9w-64x9 Fickling Blocklist Bypass: cProfile.run()
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 16 Jan 2026 19:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:trailofbits:fickling:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}


Tue, 13 Jan 2026 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 12 Jan 2026 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Trailofbits
Trailofbits fickling
Vendors & Products Trailofbits
Trailofbits fickling

Sat, 10 Jan 2026 01:45:00 +0000

Type Values Removed Values Added
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.
Title Fickling Blocklist Bypass: cProfile.run()
Weaknesses CWE-184
CWE-502
References
Metrics cvssV4_0

{'score': 8.9, 'vector': '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-01-13T21:49:38.169Z

Reserved: 2026-01-07T21:50:39.534Z

Link: CVE-2026-22607

cve-icon Vulnrichment

Updated: 2026-01-13T21:49:27.585Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-10T02:15:49.780

Modified: 2026-01-16T18:58:22.570

Link: CVE-2026-22607

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-12T14:36:41Z

Weaknesses