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Vulnerability record · CVE-2025-67748 · published 16 December 2025

CVE-2025-67748: Trailofbits fickling code injection vulnerability

Trailofbits · Fickling

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.

7.1 CVSS 4.0 High EPSS 0.27% · top 82.8% CWE-94 · Code injectionCWE-184 · CWE-184
7.1CVSS 4.0 base score
0.27%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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.

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/trailofbits/fickling/pull/108 Issue TrackingPatch
https://github.com/trailofbits/fickling/pull/187 Issue TrackingPatch
https://github.com/trailofbits/fickling/security/advisories/GHSA-r7v6-mfhq-g3m2 ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-14535Trailofbits fickling vulnerabilityIn Trail of Bits fickling versions up to and including 0.1.11, the UnsafeImportsML analysis pass unconditionally calls AnalysisContext.shorten_code(n…EPSS 0.56%8.9CVE-2026-22609Trailofbits fickling deserialization of untrusted data vulnerabilityFickling is a Python pickling decompiler and static analyzer. Prior to version 0.1.7, the unsafe_imports() method in Fickling's static analyzer fails…EPSS 0.64%8.9CVE-2026-22612Trailofbits fickling deserialization of untrusted data vulnerabilityFickling is a Python pickling decompiler and static analyzer. Prior to version 0.1.7, Fickling is vulnerable to detection bypass due to "builtins" bl…EPSS 0.31%8.9CVE-2026-22606Trailofbits fickling deserialization of untrusted data vulnerabilityFickling is a Python pickling decompiler and static analyzer. Fickling versions up to and including 0.1.6 do not treat Python’s runpy module as unsaf…EPSS 0.49%8.9CVE-2026-22607Trailofbits fickling deserialization of untrusted data vulnerabilityFickling is a Python pickling decompiler and static analyzer. Fickling versions up to and including 0.1.6 do not treat Python's cProfile module as un…EPSS 0.53%8.9CVE-2026-22608Trailofbits fickling deserialization of untrusted data vulnerabilityFickling is a Python pickling decompiler and static analyzer. Prior to version 0.1.7, both ctypes and pydoc modules aren't explicitly blocked. Even o…EPSS 0.40%8.8CVE-2026-14534Trailofbits fickling deserialization of untrusted data vulnerabilityTrail of Bits fickling versions up to and including 0.1.10 do not include the Python standard library modules _posixsubprocess, site, and atexit in t…EPSS 0.59%7.1CVE-2025-67747Trailofbits fickling deserialization of untrusted data vulnerabilityFickling is a Python pickling decompiler and static analyzer. Versions prior to 0.1.6 are missing `marshal` and `types` from the block list of unsafe…EPSS 0.28%

Source: NIST National Vulnerability Database (record CVE-2025-67748), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.