Starlette has possible denial-of-service vector when parsing large files in multipart forms

SummaryWhen parsing a multi-part form with large files greater than the default max spool size starlette will block the main thread to roll the file over to disk. This blocks the event thread which means we can't accept new connections. DetailsPlease see this discussion for details:...

Important: python-tornado

Issue Overview: Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting default 100MB. Since parsing occurs synchronously on the main thread, this creates...

Security update for python-starlette

This update for python-starlette fixes the following issues: CVE-2025-54121: Correctly parse multi-part form with large files to avoid DoS. bsc1246855 Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST onlineupdate or "zypper patch"...

SUSE CVE-2025-54121

Starlette is a lightweight ASGI Asynchronous Server Gateway Interface framework/toolkit, designed for building async web services in Python. In versions 0.47.1 and below, when parsing a multi-part form with large files greater than the default max spool size starlette will block the main thread t...