CVE-2026-21871

MEDIUM

6.1

Descripcion

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 been patched in version 3.5.0.

Detalles CVE

Puntuacion CVSS v3.16.1

SeveridadMEDIUM

Vector CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Vector de ataqueNETWORK

ComplejidadLOW

Privilegios requeridosNONE

Interaccion usuarioREQUIRED

Publicado1/8/2026

Ultima modificacion1/15/2026

Fuentenvd

Avistamientos honeypot0

Productos afectados

zauberzeug:nicegui

Debilidades (CWE)

CWE-79

Referencias

https://github.com/zauberzeug/nicegui/releases/tag/v3.5.0(security-advisories@github.com)

https://github.com/zauberzeug/nicegui/security/advisories/GHSA-7grm-h62g-5m97(security-advisories@github.com)

Correlaciones IOC

Sin correlaciones registradas

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