CVE-2025-67748
High
Description
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.
SeverityHigh
CVSS7.8
Exploit probability—
ProductTrailofbits Fickling
PublishedDec 16, 2025
First seenDec 16, 2025
How to fix
Update
- trailofbits fickling0.1.6 or later
- fickling0.1.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| trailofbits fickling | v < 0.1.6 | 0.1.6 |
| ficklingPyPI | v < 0.1.6 | 0.1.6 |
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