Is CVE-2025-71356 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2025-71356 being exploited in the wild.

How severe is CVE-2025-71356?

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=0.0.28.

Is there a fix for CVE-2025-71356?

Yes. picklescan (PyPI): upgrade to 0.0.28 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2025-71356 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2025-71356?

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.

CVE-2025-71356: picklescan detection bypass in torch.fx.experimental.symbolic_shapes

CVE-2025-71356 · 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 prior to 0.0.28 allows specially crafted malicious files to bypass detection by using a specific PyTorch function. If a user trusts the scan results and opens the file, an attacker could execute arbitrary code on the victim's system, potentially leading to a full system compromise or data theft.

Technologies: picklescan (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2025-71356 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2025-71356 being exploited in the wild.
How severe is CVE-2025-71356?: 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=0.0.28.
Is there a fix for CVE-2025-71356?: Yes. picklescan (PyPI): upgrade to 0.0.28 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2025-71356 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2025-71356?: 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 0.0.28 or later
```
pip install "picklescan>=0.0.28"
```

Technical details

A deserialization vulnerability (CWE-502) exists in picklescan due to an incomplete blocklist of dangerous functions. Specifically, the scanner fails to identify and flag the 'torch.fx.experimental.symbolic_shapes.ShapeEnv.evaluate_guards_expression' function, which can be leveraged to execute arbitrary Python code during the unpickling process. An attacker can craft a malicious pickle file containing this function call in a '__reduce__' method. When a victim scans the file, picklescan reports it as safe; if the victim subsequently loads the file using 'pickle.load()', the embedded payload executes. This issue is resolved in version 0.0.28.

Affected products

picklescan picklescan < 0.0.28

Identifiers

CVE-2025-71356
GHSA-f4x7-rfwp-v3xw

Timeline

2025-08-22: advisory: GitHub Security Advisory published
2026-07-04: disclosed: NVD publication date

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.