CVE-2026-25516 describes a Cross-Site Scripting (XSS) vulnerability in NiceGUI, a Python UI framework, specifically within its ui.markdown() component. This flaw allows attackers to inject malicious HTML and JavaScript into applications that render user-controlled content through ui.markdown(), due to the component's default behavior of passing raw HTML without sanitization. Rated as Medium severity (CVSS 6.1), the vulnerability requires user interaction (UI:R) and can lead to information disclosure and data manipulation (C:L, I:L). There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 3.7.0CPE matchmatch criteria | cpe:2.3:a:zauberzeug:nicegui:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.