Python Pickle Decompiler Vulnerability in Fickling by Trail of Bits
CVE-2026-22606

8.9HIGH

Key Information:

Vendor

Trailofbits

Status
Fickling
Vendor
CVE Published:
10 January 2026

What is CVE-2026-22606?

Fickling, a Python pickling decompiler and static analyzer, contains a vulnerability that misclassifies potentially malicious pickles due to unsafe handling of Python's runpy module. Versions up to and including 0.1.6 inaccurately label a pickle leveraging runpy.run_path() or runpy.run_module() as SUSPICIOUS instead of OVERTLY_MALICIOUS. This misclassification can mislead users into executing malicious code unknowingly when relying on Fickling's output for safe deserialization. The issue has been addressed in version 0.1.7, highlighting the importance of keeping software updated to mitigate security risks.

Affected Version(s)

fickling < 0.1.7

References

https://github.com/trailofbits/fickling/security/advisori...
x_refsource_CONFIRM
https://github.com/trailofbits/fickling/commit/9a2b3f89bd...
x_refsource_MISC
https://github.com/trailofbits/fickling/releases/tag/v0.1.7
x_refsource_MISC

CVSS V4

Score:
8.9
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.