NiceGUI's unvalidated chunk size parameter in media routes can cause memory exhaustion

Summary NiceGUI's app.addmediafile and app.addmediafiles media routes accept a user-controlled query parameter that influences how files are read during streaming. The parameter is passed to the range-response implementation without validation, allowing an attacker to bypass chunked streaming and...

PT-2026-26484

Name of the Vulnerable Software and Affected Versions NiceGUI versions prior to 3.9.0 Description NiceGUI’s app.add media file and app.add media files functions are susceptible to a flaw where a user-controlled query parameter, passed to the range-response implementation without validation, can...