Disclosure summary
Fickling is a Python pickling decompiler and static analyzer. Versions prior to 0.1.6 are missing `marshal` and `types` from the block list of unsafe module imports. Fickling started blocking both modules to address this issue. This allows an attacker to craft a malicious pickle file that can bypass fickling since it misses detections for `types.FunctionType` and `marshal.loads`. A user who deserializes such a file, believing it to be safe, would inadvertently execute arbitrary code on their system. This impacts any user or system that uses Fickling to vet pickle files for security issues. The issue was fixed in version 0.1.6.
Source-reported weakness categories
CWE-184, CWE-502
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2025-67747
Open original source · Updated Oct 07, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| trailofbits | fickling | * {"versionEndExcluding":"0.1.6"} |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Patch
- github.com — Issue Tracking
- github.com — Release Notes
- github.com — Exploit, Third Party Advisory
PUBLISHED 2025-12-15T20:15:52-05:00
MODIFIED 2026-10-07T15:10:00-04:00
INGESTED 2026-10-08T12:35:47-04:00