CVE-2025-67748 HIGH

CVE-2025-67748: Fickling has Code Injection vulnerability via pty.spawn()

Vendor Trailofbits
Product fickling
Weakness CWE-184
Published December 16, 2025
Last update December 16, 2025
View on NVD All CVEs

CVSS base score

7.1/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 16, 2025 CVE published
December 16, 2025 Record updated