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...

CVE-2025-54121

CVE-2025-54121 affects Starlette (Python, ASGI). In versions 0.47.1 and older, multipart form parsing of large files can cause the main event loop to stall while rolling the file to disk, because UploadFile incorrectly checks file-in-memory status and whether additional bytes trigger a rollover. ...