CVE-2025-71364: picklescan detection bypass in asyncio unix_events

CVE-2025-71364 · Severity: high · CVSS 8.1 · Published 2026-07-04

picklescan is a security tool used to scan Python pickle files and machine learning models for malicious code. A vulnerability in versions before 0.0.30 allows specially crafted malicious files to bypass detection by using an overlooked internal Python function. If a user trusts the scan results and opens the file, an attacker could execute arbitrary commands on the user's system, potentially leading to a full system compromise.

Technologies: picklescan (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2025-71364 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-71364 being exploited in the wild.
How severe is CVE-2025-71364?
High severity, with a CVSS score of 8.1, published 4 July 2026.
Which products and versions are affected?
picklescan (PyPI) ECOSYSTEM:introduced=0,fixed=0.0.30.
Is there a fix for CVE-2025-71364?
Yes. picklescan (PyPI): upgrade to 0.0.30 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2025-71364 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2025-71364?
Check whether you run picklescan (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • picklescan (PyPI): upgrade to 0.0.30 or later
    pip install "picklescan>=0.0.30"

Technical details

A deserialization vulnerability (CWE-502) exists in picklescan due to an incomplete blocklist of dangerous functions. The scanner fails to identify the 'asyncio.unix_events._UnixSubprocessTransport._start' function when used within a pickle 'reduce' method. An attacker can craft a malicious pickle file or PyTorch model embedding this function to evade detection. When the victim subsequently loads the file using 'pickle.load()', the embedded commands are executed. This issue is resolved in version 0.0.30.

Affected products

  • picklescan picklescan < 0.0.30

Identifiers

  • CVE-2025-71364
  • GHSA-q77w-mwjj-7mqx

Timeline

  • 2025-08-26: advisory: Initial GitHub security advisory published
  • 2026-07-04: disclosed: CVE published to NVD

References

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