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.
References
| Link | Resource |
|---|---|
| https://github.com/zauberzeug/nicegui/commit/6c52eb2c90c4b67387c025b29646b4bc1578eb83 | Patch |
| https://github.com/zauberzeug/nicegui/releases/tag/v3.5.0 | Release Notes |
| https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2 | Exploit Vendor Advisory |
| https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2 | Exploit Vendor Advisory |
Configurations
History
15 Jan 2026, 17:50
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:zauberzeug:nicegui:*:*:*:*:*:*:*:* | |
| First Time |
Zauberzeug
Zauberzeug nicegui |
|
| References | () https://github.com/zauberzeug/nicegui/commit/6c52eb2c90c4b67387c025b29646b4bc1578eb83 - Patch | |
| References | () https://github.com/zauberzeug/nicegui/releases/tag/v3.5.0 - Release Notes | |
| References | () https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2 - Exploit, Vendor Advisory |
08 Jan 2026, 15:15
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2 - |
08 Jan 2026, 10:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-01-08 10:15
Updated : 2026-01-15 17:50
NVD link : CVE-2026-21874
Mitre link : CVE-2026-21874
CVE.ORG link : CVE-2026-21874
JSON object : View
Products Affected
zauberzeug
- nicegui
CWE
CWE-772
Missing Release of Resource after Effective Lifetime