CVSS 3.1
5.3 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LCVE-2026-21874
Medium (5.3) in zauberzeug nicegui. EPSS 0.6% chance of exploitation in the next 30 days. Fixed in nicegui 3.5.0.
NiceGUI is a Python-based UI framework. From versions v2.10.0 to 3.4.1, an unauthenticated attacker can exhaust Redis connections by repeatedly opening and closing browser tabs on any NiceGUI application using Redis-backed storage. Connections are never released, leading to service degradation when Redis hits its connection limit. NiceGUI continues accepting new connections - errors are logged but the app stays up with broken storage functionality. This issue has been patched in version 3.5.0.
Severity
- EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 46% of CVEs (scores of 2026-10-31)
- CWE
- CWE-772
- Published
- Modified
- Record from
- the NVD, synced
Affected
- zauberzeug:nicegui
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-mp55-g7pj-rvm2 | PyPI | nicegui | >=2.10.0 <3.5.0 | 3.5.0 |
| PYSEC-2026-1703 | PyPI | nicegui | >=2.10.0 <3.5.0 | 3.5.0 |