CVE-2026-22608 PUBLISHED

Fickling vulnerable to use of ctypes and pydoc gadget chain to bypass detection

Assigner: GitHub_M
Reserved: 07.01.2026 Published: 10.01.2026 Updated: 13.01.2026

Fickling is a Python pickling decompiler and static analyzer. Prior to version 0.1.7, both ctypes and pydoc modules aren't explicitly blocked. Even other existing pickle scanning tools (like picklescan) do not block pydoc.locate. Chaining these two together can achieve RCE while the scanner still reports the file as LIKELY_SAFE. This issue has been patched in version 0.1.7.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
CVSS Score: 8.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	trailofbits
Product	fickling
Versions	Version < 0.1.7 is affected

References

Problem Types

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