# Duplicate Advisory: Insecure Deserialization (pickle) in pdfminer.six CMap Loader , Local Privesc

Source: https://junglewise.ai/threats/duplicate-advisory-insecure-deserialization-pickle-in-pdfminer-six-cmap-1298a76c  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-02-03  
License: CC BY 4.0 with a link back

Severity: low · CVSS 3.1 · Published 2026-02-03

Duplicate Advisory: Insecure Deserialization (pickle) in pdfminer.six CMap Loader — Local Privesc

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

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Low severity, with a CVSS score of 3.1, published 3 February 2026.

**Which products and versions are affected?** pdfminer-six (PyPI) ECOSYSTEM:introduced=0,fixed=20251230.

**Is there a fix for This vulnerability?** Yes. pdfminer-six (PyPI): upgrade to 20251230 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run pdfminer-six (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

- pdfminer-six (PyPI): upgrade to 20251230 or later

  ```sh
  pip install "pdfminer-six>=20251230"
  ```


## Affected products

- pdfminer-six (PyPI) ECOSYSTEM:introduced=0,fixed=20251230

## Related threats

- [PYSEC-2026-1761 - Insecure Deserialization (pickle) in pdfminer.six CMap Loader , Local Privesc](https://junglewise.ai/threats/cve-2025-70559-insecure-deserialization-pickle-in-pdfminer-six-cmap-loader-local)
- [PYSEC-2026-1762 - Arbitrary Code Execution in pdfminer.six via Crafted PDF Input](https://junglewise.ai/threats/cve-2025-64512-arbitrary-code-execution-in-pdfminer-six-via-crafted-pdf-input)