CVE-2025-71358: picklescan detection bypass via idlelib get_entity function

CVE-2025-71358 · Severity: high · CVSS 8.1 · Published 2026-06-22

Picklescan is a security tool used to detect malicious code hidden in Python "pickle" files, which are commonly used to store machine learning models. A vulnerability was found where certain malicious commands could bypass detection by using a specific Python library function. If a user relies on Picklescan to verify a file and then opens it, an attacker could execute arbitrary code on the user's system.

Technologies: picklescan (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2025-71358 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-71358 being exploited in the wild.
How severe is CVE-2025-71358?
High severity, with a CVSS score of 8.1, published 22 June 2026.
Which products and versions are affected?
picklescan (PyPI) < 0.0.29, ECOSYSTEM:introduced=0,fixed=0.0.29.
Is there a fix for CVE-2025-71358?
Yes. picklescan (PyPI): upgrade to 0.0.29 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2025-71358 attacked?
It is attacked with local access, in a software library.
Am I affected by CVE-2025-71358?
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 0.0.29 or later
    pip install "picklescan>=0.0.29"

Technical details

Picklescan (versions prior to 0.0.29) contains a detection bypass vulnerability. The tool fails to flag malicious pickle files that use the `idlelib.autocomplete.AutoComplete.get_entity` function within a `__reduce__` method to execute arbitrary system commands. An attacker can craft a malicious pickle file (such as a PyTorch model) that passes Picklescan's security checks but executes code via `pickle.load()`. This is a bypass of the library's primary security function. The issue is resolved in version 0.0.29.

Affected products

  • mmaitre314 picklescan < 0.0.29

Identifiers

  • CVE-2025-71358
  • GHSA-6w4w-5w54-rjvr
  • PYSEC-2026-1784

Timeline

  • 2025-08-26: disclosed
  • 2025-08-26: advisory
  • 2025-08-26: patched: Fixed in version 0.0.29

References

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