Receiving 413 - RequestEntityTooLarge response

[decarmona]

Hello!

I've been using Flask v3.0.0 with Werkzeug v3.0.6

I recently updated to Flask 3.0.3 which the update came with Werkzeug 3.1.2 but now one of my endpoints (responsible for uploading files) suddenly started responding with 413 RequestEntityTooLarge.

• Originally, MAX_CONTENT_LENGTH at Flask was left unset. Tried setting it to a higher value but the issue persists.
• Only happens with files larger than 100 KB.
• Downgraded Werkzeug to v3.0.6 and the issue was gone/fixed.

Thank you guys for your amazing support! <3

Environment:

• Python version: 3.11.10
• Werkzeug version: 3.1.2

[davidism]

Be sure to include a minimal reproducible example when reporting an issue. I can't reproduce this issue with the information provided. Uploading a file > 100kb (or > 1GB) does not raise an error. Perhaps you're seeing the new default max_form_memory_size (500kB) introduced in #2964, but that deals with non-file fields only.