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7.6

picklescan may run hidden code in malicious files

CVE-2025-71376 · published 3 months ago
Summary

The picklescan tool can be tricked by specially crafted files to run any code an attacker includes. This means that loading such a file could cause unwanted programs to start on your system. Update picklescan to the latest version or avoid scanning untrusted files until you can upgrade.

What to do
  • Update matthieu maitre picklescan to version 0.0.29.
  • Update picklescan to version 0.0.29.
Affected software
Ecosystem VendorProductAffected versions
pip matthieu maitre picklescan < 0.0.29
Fix: upgrade to 0.0.29
pip – picklescan < 0.0.29
Fix: upgrade to 0.0.29
Original advisory text
picklescan - Arbitrary Code Execution via Undetected idlelib.autocomplete.AutoComplete.fetch_completions
picklescan before 0.0.29 fails to detect malicious pickle files using idlelib.autocomplete.AutoComplete.fetch_completions in reduce methods. Attackers can embed undetected code in pickle files that executes arbitrary commands when loaded by victims.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker full control
Severity
7.6 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-502Deserialization of Untrusted Data
Timeline
Published23 Jun 2026
Updated11 Oct 2026
First seen6 Mar 2026
Sources
GHSA-7cq8-mj8x-j263 · GHSA
CVE-2025-71376 · NVD
GHSA-7cq8-mj8x-j263 · OSV
PYSEC-2026-4133 · OSV
CVE-2025-71376 · OSV
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