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NVD Vulnerability Details :
CVE-2026-21874
Analyzed
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-08 Jan, 2026 | 10:15
Updated At-15 Jan, 2026 | 17:50

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Type: Secondary
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CPE Matches
zauberzeug
zauberzeug
>>nicegui>>Versions from 2.10.0(inclusive) to 3.5.0(exclusive)
cpe:2.3:a:zauberzeug:nicegui:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-772Secondarysecurity-advisories@github.com
CWE ID: CWE-772
Type: Secondary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/zauberzeug/nicegui/commit/6c52eb2c90c4b67387c025b29646b4bc1578eb83security-advisories@github.com
Patch
https://github.com/zauberzeug/nicegui/releases/tag/v3.5.0security-advisories@github.com
Release Notes
https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2security-advisories@github.com
Exploit
Vendor Advisory
https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit
Vendor Advisory
Hyperlink: https://github.com/zauberzeug/nicegui/commit/6c52eb2c90c4b67387c025b29646b4bc1578eb83
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/zauberzeug/nicegui/releases/tag/v3.5.0
Source: security-advisories@github.com
Resource:
Release Notes
Hyperlink: https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2
Source: security-advisories@github.com
Resource:
Exploit
Vendor Advisory
Hyperlink: https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
Exploit
Vendor Advisory
Change History
0Changes found
Details not found