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Threat Database
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Threat Entry
Updated 2026-01-15
CVE-2026-21873 - Nicegui Plugin
NiceGUI is a Python-based UI framework. From versions 2.22.0 to 3.4.1, an unsafe implementation in the pushstate event listener used by ui.sub_pages allows an attacker to manipulate the fragment identifier of the URL, which they can do despite being cross-site, using an iframe. This issue has been patched in version 3.5.0.
PLUGIN
Nicegui
CVE-2026-21873
Risk Score
Threat Entry
Updated 2026-01-15
CVE-2026-21872 - Nicegui Plugin
NiceGUI is a Python-based UI framework. From versions 2.22.0 to 3.4.1, an unsafe implementation in the click event listener used by ui.sub_pages, combined with attacker-controlled link rendering on the page, causes XSS when the user actively clicks on the link. This issue has been patched in version 3.5.0.
PLUGIN
Nicegui
CVE-2026-21872
Risk Score
Threat Entry
Updated 2026-01-15
CVE-2026-21871 - Nicegui Plugin
NiceGUI is a Python-based UI framework. From versions 2.13.0 to 3.4.1, there is a XSS risk in NiceGUI when developers pass attacker-controlled strings into ui.navigate.history.push() or ui.navigate.history.replace(). These helpers are documented as History API wrappers for updating the browser URL without page reload. However, if the URL argument is embedded into generated JavaScript without proper escaping, a crafted payload can break out of the intended string context and execute arbitrary JavaScript in the victim’s browser. Applications that do not pass untrusted input into ui.navigate.history.push/replace are not affected. This issue has…
PLUGIN
Nicegui
CVE-2026-21871
Risk Score
Threat Entry
Updated 2026-01-15
CVE-2026-21874 - Nicegui Plugin
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.
PLUGIN
Nicegui
CVE-2026-21874
Risk Score