Pdfminer.six is a community maintained fork of the original PDFMiner, a tool for extracting information from PDF documents. Prior to version 20251107, pdfminer.six will execute arbitrary code from a malicious pickle file if provided with a malicious PDF file. The `CMapDB._load_data()` function in pdfminer.six uses `pickle.loads()` to deserialize pickle files. These pickle files are supposed to be part of the pdfminer.six distribution stored in the `cmap/` directory, but a malicious PDF can specify an alternative directory and filename as long as the filename ends in `.pickle.gz`. A malicious, zipped pickle file can then contain code which will automatically execute when the PDF is processed. Version 20251107 fixes the issue.
History

Wed, 12 Nov 2025 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 12 Nov 2025 13:00:00 +0000

Type Values Removed Values Added
First Time appeared Pdfminer
Pdfminer pdfminer.six
Vendors & Products Pdfminer
Pdfminer pdfminer.six

Mon, 10 Nov 2025 22:15:00 +0000

Type Values Removed Values Added
Description Pdfminer.six is a community maintained fork of the original PDFMiner, a tool for extracting information from PDF documents. Prior to version 20251107, pdfminer.six will execute arbitrary code from a malicious pickle file if provided with a malicious PDF file. The `CMapDB._load_data()` function in pdfminer.six uses `pickle.loads()` to deserialize pickle files. These pickle files are supposed to be part of the pdfminer.six distribution stored in the `cmap/` directory, but a malicious PDF can specify an alternative directory and filename as long as the filename ends in `.pickle.gz`. A malicious, zipped pickle file can then contain code which will automatically execute when the PDF is processed. Version 20251107 fixes the issue.
Title pdfminer.six vulnerable to Arbitrary Code Execution via Crafted PDF Input
Weaknesses CWE-502
References
Metrics cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-11-12T20:13:39.426Z

Reserved: 2025-11-05T21:15:39.399Z

Link: CVE-2025-64512

cve-icon Vulnrichment

Updated: 2025-11-12T17:35:04.737Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-11-10T22:15:40.067

Modified: 2025-11-12T21:15:54.273

Link: CVE-2025-64512

cve-icon Redhat

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