Update pdfminer.six to v20251107 and require Python 3.9+ #3437
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This update addresses issue #3434 by updating the pdfminer.six dependency from version 20240706 (July 2024) to the latest version 20251107 (November 2025). Key changes: - Update pdfminer.six from >=20220524,<=20240706 to >=20251107 - Update python_requires from >=3.8 to >=3.9 - Remove Python 3.8 from CI test matrix in GitHub Actions Security fix: Version 20251107 includes a critical fix for arbitrary code execution when loading pickle cmaps (CVE pending). This vulnerability could allow an attacker to execute arbitrary code by crafting a malicious PDF file with specially-crafted pickle-serialized character map data. Breaking change: pdfminer.six dropped Python 3.8 support in v20250327, requiring this project to also bump its minimum Python version to 3.9. Testing: All unit tests pass, and PDF parsing functionality has been verified with sample PDF files. Fixes #3434 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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This update addresses issue #3434 by updating the pdfminer.six dependency from version 20240706 (July 2024) to the latest version 20251107 (November 2025).
Key changes:
Security fix: Version 20251107 includes a critical fix for arbitrary code execution when loading pickle cmaps (CVE pending). This vulnerability could allow an attacker to execute arbitrary code by crafting a malicious PDF file with specially-crafted pickle-serialized character map data.
Breaking change: pdfminer.six dropped Python 3.8 support in v20250327, requiring this project to also bump its minimum Python version to 3.9.
Testing: All unit tests pass, and PDF parsing functionality has been verified with sample PDF files.
Fixes #3434
cc: @smoelius
🤖 Generated with Claude Code