# CVE-2025-64512

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.

- Page: https://www.vulneraibility.com/cve/CVE-2025-64512
- CVSS: 8.6
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 0.33% (percentile 27.1)
- Unvetted proof-of-concept code on GitHub: 10 GitHub proofs of concept (first 2025-12-11)
- CISA SSVC: exploitation poc, automatable no, technical impact total (assessed 2025-11-12)
- Weakness: CWE-502
- Published: 2025-11-10

## Affected versions

- pdfminer pdfminer.six: affected < 20251107

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://github.com/pdfminer/pdfminer.six/security/advisories/GHSA-wf5f-4jwr-ppcp
- [other] https://github.com/pdfminer/pdfminer.six/commit/b808ee05dd7f0c8ea8ec34bdf394d40e63501086
- [other] https://github.com/pdfminer/pdfminer.six/releases/tag/20251107
- [other] https://lists.debian.org/debian-lts-announce/2025/11/msg00017.html
- [other] https://lists.debian.org/debian-lts-announce/2026/01/msg00005.html

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.