CVE-2025-67748: Trailofbits Fickling

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Trailofbits Fickling: before 0.1.6 (fixed in 0.1.6)

Published 2025-12-16. Last modified 2026-10-07.