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This is the Werkzeug 3.1.4 fix release, which fixes bugs but does not otherwise change behavior and should not result in breaking changes compared to the latest feature release.

PyPI: https://pypi.org/project/Werkzeug/3.1.4/ Changes: https://werkzeug.palletsprojects.com/page/changes/#version-3-1-4 Milestone: https://github.com/pallets/werkzeug/milestone/42?closed=1

  • safe_join on Windows does not allow special device names. This prevents reading from these when using send_from_directory. secure_filename already prevented writing to these. ghsa-hgf8-39gv-g3f2
  • The debugger pin fails after 10 attempts instead of 11. [#3020]
  • The multipart form parser handles a \r\n sequence at a chunk boundary. [#3065]
  • Improve CPU usage during Watchdog reloader. [#3054]
  • Request.json annotation is more accurate. [#3067]
  • Traceback rendering handles when the line number is beyond the available source lines. [#3044]
  • HTTPException.get_response annotation and doc better conveys the distinction between WSGI and sans-IO responses. [#3056]
Source: README.md, updated 2025-11-29