RCE in Trailofbits Fickling
CVE-2025-67748
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.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (17.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000
Affected products
- Trailofbits Fickling — versions < 0.1.6
Weakness classification (CWE)
References
- github.com/trailofbits/fickling/security/advisories/GHSA-r7v6-mfhq-g3m2 (Exploit, Vendor Advisory)
- github.com/trailofbits/fickling/pull/108 (Patch, Issue Tracking)
- github.com/trailofbits/fickling/pull/187 (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2025-67748?
- CVE-2025-67748 is a high-severity vulnerability in Trailofbits Fickling, classified under Code Injection. CVSS score: 7.8/10. Published 2025-12-16.
- How severe is CVE-2025-67748?
- High severity. CVSS v3 base score is 7.8 out of 10.