High severityOSV Advisory· Published Dec 16, 2025· Updated Dec 16, 2025
Fickling has Code Injection vulnerability via pty.spawn()
CVE-2025-67748
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
ficklingPyPI | < 0.1.6 | 0.1.6 |
Affected products
2- Range: master, v0.0.1, v0.0.2, …
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-r7v6-mfhq-g3m2ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-67748ghsaADVISORY
- github.com/pypa/advisory-database/tree/main/vulns/fickling/PYSEC-2025-113.yamlghsaWEB
- github.com/trailofbits/fickling/pull/108ghsax_refsource_MISCWEB
- github.com/trailofbits/fickling/pull/187ghsax_refsource_MISCWEB
- github.com/trailofbits/fickling/security/advisories/GHSA-r7v6-mfhq-g3m2ghsax_refsource_CONFIRMWEB
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