CVE-2025-67748

Fickling has Code Injection vulnerability via pty.spawn()

Published Dec 16, 2025 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-r7v6-mfhq-g3m2 Fickling has Code Injection vulnerability via pty.spawn()
History
Type Values Removed Values Added
CPEs cpe:2.3:a:trailofbits:fickling:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Trailofbits
Trailofbits fickling
Vendors & Products Trailofbits
Trailofbits fickling
Type Values Removed Values Added
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.
Title Fickling has Code Injection vulnerability via pty.spawn()
Weaknesses CWE-184
CWE-502
CWE-94
References
Metrics cvssV4_0

{'score': 7.1, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Dec 16, 2025, 9:12 PM
Reserved
Dec 11, 2025, 8:30 PM
Status
Analyzed
Published
Dec 16, 2025, 1:15 AM
Modified
Oct 7, 2026, 7:10 PM