CVE-2025-71347

High

Description

picklescan before 0.0.33 fails to detect malicious pickle files using numpy.f2py.crackfortran.param_eval function in reduce methods, allowing attackers to bypass security checks. Remote attackers can embed undetected code in pickle files that executes during deserialization, enabling arbitrary code execution in applications loading untrusted pickle data.

SeverityHigh

CVSS8.1

Exploit probability—

ProductPicklescan

PublishedJul 4, 2026

First seenJul 4, 2026

Weakness typeCWE-502Deserialization of untrusted data

How to fix

Update

picklescan0.0.33 or later

Vendor advisories

github.com/mmaitre314/picklescan/security/advisories/GHSA-cffc-mxrf-mhh4

Affected products

Product	Affected versions	Fixed in
picklescanPyPI	v < 0.0.33	0.0.33

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