Fickling is a Python pickling decompiler and static analyzer.
CVE-2025-67747
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.
Assessment
- CVSS
- 7.1 (v4.0)
- Severity
- High
- EPSS
- 0.28% chance of exploitation in the next 30 days
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 16 December 2025
- Last updated
- 7 October 2026
- Affected
- trailofbits · fickling
- Weakness
- CWE-184, CWE-502
- Assigner
- security-advisories@github.com
CVSS vectorCVSS: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
At the source
References
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