Fickling is a Python pickling decompiler and static analyzer. Versions prior to 0.1.6 had a bypass caused by `pty` missing from the block list of unsafe module imports. This led to unsafe pickles based on `pty.spawn()` being incorrectly flagged as `LIKELY_SAFE`, and was fixed in version 0.1.6. This impacted any user or system that used Fickling to vet pickle files for security issues.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-r7v6-mfhq-g3m2 Fickling has Code Injection vulnerability via pty.spawn()
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 02 Jan 2026 16:00:00 +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, 16 Dec 2025 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 16 Dec 2025 21:00:00 +0000

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

Tue, 16 Dec 2025 00:45:00 +0000

Type Values Removed Values Added
Description Fickling is a Python pickling decompiler and static analyzer. Versions prior to 0.1.6 had a bypass caused by `pty` missing from the block list of unsafe module imports. This led to unsafe pickles based on `pty.spawn()` being incorrectly flagged as `LIKELY_SAFE`, and was fixed in version 0.1.6. This impacted any user or system that used Fickling to vet pickle files for security issues.
Title Fickling has Code Injection vulnerability via pty.spawn()
Weaknesses CWE-184
CWE-502
CWE-94
References
Metrics cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-12-16T21:12:34.235Z

Reserved: 2025-12-11T20:30:54.927Z

Link: CVE-2025-67748

cve-icon Vulnrichment

Updated: 2025-12-16T21:12:30.336Z

cve-icon NVD

Status : Analyzed

Published: 2025-12-16T01:15:52.950

Modified: 2026-01-02T15:58:53.810

Link: CVE-2025-67748

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-12-16T20:45:31Z

Weaknesses