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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/trailofbits/fickling/commit/4e34561301bda1450268d1d7b0b2b151de33b913	Patch
https://github.com/trailofbits/fickling/pull/186	Issue Tracking
https://github.com/trailofbits/fickling/releases/tag/v0.1.6	Release Notes
https://github.com/trailofbits/fickling/security/advisories/GHSA-565g-hwwr-4pp3	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:trailofbits:fickling:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2025-12-16 01:15

Updated : 2026-01-02 15:59

NVD link : CVE-2025-67747

Mitre link : CVE-2025-67747

CVE.ORG link : CVE-2025-67747

JSON object : View

Products Affected

trailofbits

fickling

CWE

CWE-184

Incomplete List of Disallowed Inputs

CWE-502

Deserialization of Untrusted Data

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