Fickling Blocklist Bypass: cProfile.run()_CVE-2026-22607

8.9 / 10

HIGH

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

Description

Fickling 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 unsafe. Because of this, a malicious pickle that uses cProfile.run() is classified as SUSPICIOUS instead of OVERTLY_MALICIOUS. If a user relies on Fickling's output to decide whether a pickle is safe to deserialize, this misclassification can lead them to execute attacker-controlled code on their system. This affects any workflow or product that uses Fickling as a security gate for pickle deserialization. This issue has been patched in version 0.1.7.

AI Analysis

A blocklist bypass vulnerability in Fickling allows an attacker to execute malicious code by misclassifying a pickle as SUSPICIOUS instead of OVERTLY_MALICIOUS.

Basic Information

ID CVE-2026-22607

Source GitHub_M

Published Jan 10, 2026 at 01:35

Affected Product

Vendor trailofbits

Product fickling

Version < 0.1.7

Affected Versions trailofbits fickling < 0.1.7

CWE Classification

CWE-184 CWE-502

AI Assessment

AI Score 8.9 / 10

AI Severity High

Vendor Trail of Bits

Product Fickling

Version 0.1.6 and earlier

References

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    "published": "2026-01-10T01:35:04.920Z",
    "modified": "2026-01-10T01:35:04.920Z",
    "type": "cve",
    "title": "Fickling Blocklist Bypass: cProfile.run()",
    "source": "GitHub_M",
    "references": "https://github.com/trailofbits/fickling/security/advisories/GHSA-p523-jq9w-64x9\nhttps://github.com/trailofbits/fickling/commit/dc8ae12966edee27a78fe05c5745171a2b138d43\nhttps://github.com/trailofbits/fickling/releases/tag/v0.1.7",
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