CVE-2026-33332
Severity CVSS v4.0:
MEDIUM
Type:
CWE-20
Input Validation
Publication date:
24/03/2026
Last modified:
24/03/2026
Description
NiceGUI is a Python-based UI framework. Prior to version 3.9.0, NiceGUI's app.add_media_file() and app.add_media_files() 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 force the server to load entire files into memory at once. With large media files and concurrent requests, this can lead to excessive memory consumption, degraded performance, or denial of service. This issue has been patched in version 3.9.0.
Impact
Base Score 4.0
6.90
Severity 4.0
MEDIUM