Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Pdfminer | Pdfminer.Six | < 2025-11-07 |
| Debian | Debian Linux | 11.0 |
Related Weaknesses (CWE)
References
- https://github.com/pdfminer/pdfminer.six/commit/b808ee05dd7f0c8ea8ec34bdf394d40ePatch
- https://github.com/pdfminer/pdfminer.six/releases/tag/20251107Release Notes
- https://github.com/pdfminer/pdfminer.six/security/advisories/GHSA-wf5f-4jwr-ppcpExploitVendor Advisory
- https://lists.debian.org/debian-lts-announce/2025/11/msg00017.htmlMailing List
- https://lists.debian.org/debian-lts-announce/2026/01/msg00005.html
- https://github.com/pdfminer/pdfminer.six/security/advisories/GHSA-wf5f-4jwr-ppcpExploitVendor Advisory
FAQ
What is CVE-2025-64512?
CVE-2025-64512 is a vulnerability with a CVSS score of 8.6 (HIGH). 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 m...
How severe is CVE-2025-64512?
CVE-2025-64512 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-64512?
Check the references section above for vendor advisories and patch information. Affected products include: Pdfminer Pdfminer.Six, Debian Debian Linux.