CVE-2025-71343: Picklescan

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

picklescan before 0.0.30 fails to detect malicious pickle files that exploit lib2to3.pgen2.pgen.ParserGenerator.make_label function in the reduce method. Attackers can craft malicious pickle files with embedded code that evades detection but executes arbitrary commands when pickle.load() is called.

Affected products

• Picklescan Picklescan: before 0.0.30 (fixed in 0.0.30)

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