PT-2026-2113 · Nicegui+1 · Nicegui+1

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CVE-2026-21874

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Published

2026-01-08

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Updated

2026-07-07

CVSS v3.1

5.3

Medium

VectorAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Name of the Vulnerable Software and Affected Versions NiceGUI versions 2.10.0 through 3.4.1
Description NiceGUI is a Python-based UI framework. An unauthenticated attacker can exhaust Redis connections by repeatedly opening and closing browser tabs on any NiceGUI application using Redis-backed storage. Connections are not released, leading to service degradation when Redis reaches its connection limit. NiceGUI continues accepting new connections, but errors are logged and storage functionality is broken.
Recommendations Upgrade to version 3.5.0 or later.

Exploit

Fix

Missing Release of Resource after Effective Lifetime

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Weakness Enumeration

Related Identifiers

CVE-2026-21874
GHSA-MP55-G7PJ-RVM2
PYSEC-2026-1703

Affected Products

Nicegui
Redis