CVE-2025-71359: Picklescan

High severity, CVSS 8.1. EPSS: 0.6% chance of exploitation in the next 30 days.

picklescan before 0.0.29 fails to detect malicious pickle payloads that utilize lib2to3.pgen2.grammar.Grammar.loads in the reduce method, allowing remote code execution. Attackers can craft pickle files embedding dangerous code that evades picklescan detection and executes during pickle.load() deserialization.

Affected products

• Picklescan Picklescan: before 0.0.29 (fixed in 0.0.29)

Published 2026-07-04. Last modified 2026-10-05.