CVE-2026-33332 (GCVE-0-2026-33332)
Vulnerability from cvelistv5 – Published: 2026-03-24 19:20 – Updated: 2026-03-25 16:19
VLAI
EPSS
VEX
Title
NiceGUI's unvalidated chunk size parameter in media routes can cause memory exhaustion
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-25 16:19 UTC
CWE
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/zauberzeug/nicegui/security/ad… | x_refsource_CONFIRM |
| https://github.com/zauberzeug/nicegui/commit/9026… | x_refsource_MISC |
| https://github.com/zauberzeug/nicegui/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zauberzeug | nicegui |
Affected:
< 3.9.0
|
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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