- Import and use sanitize_filename utility in ui_upload endpoint
- Enhance sanitize_filename to handle Windows-style paths (backslashes)
- Add protection against path traversal patterns (..)
- Replace all path separators with underscores
- Add comprehensive security tests for Windows-style paths and mixed separators
- All existing tests pass with improved security
This addresses the "Uncontrolled data used in path expression" code scanning alert
by ensuring all user-provided filenames are properly sanitized before being used
in any file operations or stored in the database.
Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>
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