Improper Validation of Specified Quantity in Input Affecting nicegui package, versions [,3.9.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-NICEGUI-15701842
- published20 Mar 2026
- disclosed19 Mar 2026
- creditKhaliun-sw1, SeongHun Pak
Introduced: 19 Mar 2026
CVE-2026-33332 (opens in a new tab)How to fix?
Upgrade nicegui to version 3.9.0 or higher.
Overview
nicegui is a Create web-based user interfaces with Python. The nice way.
Affected versions of this package are vulnerable to Improper Validation of Specified Quantity in Input in the chunk_size parameter in app.add_media_file() and app.add_media_files() media routes. An attacker can cause excessive memory consumption and degrade server performance by sending crafted requests with large or unvalidated values, leading the server to load entire files into memory instead of streaming them in chunks. This can be amplified with concurrent requests to large media files.