Log in / Sign up

Vulnerability details

CVE-2025-67747

trailofbits fickling

Fickling has missing detection for marshal.loads and types.FunctionType in unsafe modules list

CVSS 4.0
7.1High

Official description

Fickling 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 module imports. Fickling started blocking both modules to address this issue. This allows an attacker to craft a malicious pickle file that can bypass fickling since it misses detections for `types.FunctionType` and `marshal.loads`. A user who deserializes such a file, believing it to be safe, would inadvertently execute arbitrary code on their system. This impacts any user or system that uses Fickling to vet pickle files for security issues. The issue was fixed in version 0.1.6.

CVSS scores

ScoreVersionSourceVector
7.1High 4.0 CVEProject cvelistV5 (CNA) (GitHub_M) 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

Affected products

VendorProductVersionsSource
trailofbits fickling < 0.1.6 CVEProject cvelistV5 (CNA)

References and advisories

4
Kolun on Telegram @kolunsec Exploited CVEs, key news and a daily digest Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.

Details

Published
2025-12-16
Last updated
2025-12-16
State
Published
Assigner (CNA)
GitHub_M

Exploit prediction (EPSS)

0.27%
Probability of exploitation in 30 days
20.3%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
Proof of concept
Technical impact
Total

Weaknesses (CWE)

  • CWE-184
    Incomplete List of Disallowed Inputs
  • CWE-502
    Deserialization of Untrusted Data