# CVE-2025-71342: picklescan detection bypass via idlelib.run.Executive.runcode

Source: https://junglewise.ai/threats/cve-2025-71342-picklescan-detection-bypass-via-idlelib-run-executive-runcode  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-04. Updated: 2026-07-04  
License: CC BY 4.0 with a link back

CVE-2025-71342 · 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 a specific built-in Python function. If a user trusts the scan results and opens the file, an attacker could gain full control over the user's system, potentially leading to data theft or supply chain attacks.

Technologies: [picklescan (PyPI)](https://junglewise.ai/threats/technologies/picklescan). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2025-71342 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-71342 being exploited in the wild.

**How severe is CVE-2025-71342?** 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-2025-71342?** 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-2025-71342 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2025-71342?** 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

  ```sh
  pip install "picklescan>=0.0.30"
  ```


## Technical details

A deserialization vulnerability exists in picklescan due to an incomplete blocklist of dangerous functions. Specifically, the scanner fails to identify the use of 'idlelib.run.Executive.runcode' within a pickle object's '__reduce__' method. An attacker can craft a malicious pickle file or PyTorch model that, when scanned, appears benign but executes arbitrary Python code upon being loaded with 'pickle.load()'. This bypasses the primary security guarantee of the library. The issue is addressed in version 0.0.30.

## Affected products

- picklescan picklescan < 0.0.30

## Identifiers

- CVE-2025-71342
- GHSA-m869-42cg-3xwr

## Timeline

- 2025-08-26: advisory: GitHub Security Advisory published
- 2026-07-04: disclosed: NVD publication date
- 2025-08-26: patched: Version 0.0.30 released

## References

- [https://github.com/mmaitre314/picklescan/security/advisories/GHSA-m869-42cg-3xwr](https://github.com/mmaitre314/picklescan/security/advisories/GHSA-m869-42cg-3xwr)
- [https://www.vulncheck.com/advisories/picklescan-undetected-remote-code-execution-via-idlelib-run-executive-runcode](https://www.vulncheck.com/advisories/picklescan-undetected-remote-code-execution-via-idlelib-run-executive-runcode)

## Related threats

- [picklescan detection bypass via _operator.methodcaller](https://junglewise.ai/threats/cve-2025-71375-picklescan-detection-bypass-via-operator-methodcaller)
- [picklescan security bypass via operator.methodcaller](https://junglewise.ai/threats/cve-2025-71373-picklescan-security-bypass-via-operator-methodcaller)
- [Picklescan detection bypass via numpy getlincoef gadget](https://junglewise.ai/threats/cve-2025-71372-picklescan-detection-bypass-via-numpy-getlincoef-gadget)
- [picklescan safety check bypass via PyTorch decoder basichandlers](https://junglewise.ai/threats/cve-2025-71369-picklescan-safety-check-bypass-via-pytorch-decoder-basichandlers)
- [picklescan security bypass via _operator.attrgetter function call](https://junglewise.ai/threats/cve-2025-71367-picklescan-security-bypass-via-operator-attrgetter-function-call)