CVE-2026-124688 · Package
NO FIX YET · SEE WHAT TO DO
Kendo UI for jQuery's TabStrip, PanelBar and Menu widgets insert a data field into an HTML attribute without escaping it. An attacker who controls that data can break out of the attribute and add event-handler markup that runs JavaScript in the victim's logged-in session.
first public Nov 11, 2026 · 1 source
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Applications that use the Kendo UI for jQuery TabStrip, PanelBar or Menu widgets with a dataSource field mapped to spriteCssClass, where the mapped data can be influenced by an attacker. Pages that render these widgets with only trusted, server-controlled data are less exposed. The sources do not say whether the flaw is reachable in default configurations.
Not affected if no-kendo-widgets, trusted-data-only
Who cares front-end, javascript, jquery, kendo-ui
@progress/kendo-ui or Kendo jQuery package version in package.json and lockfiles.spriteCssClass.2026.4.1111 or later.In Progress® Kendo® UI for jQuery prior to 2026.4.1111 the TabStrip, PanelBar, and Menu widgets support mapping a dataSource field to spriteCssClass. If an attacker can control the mapped data, they can break out of the attribute and inject markup, including event-handler attributes. The resulting JavaScript executes in the application's origin when a victim loads a page that renders the affected widget, allowing access to data and actions available in the victim's authenticated session.
This page as .md · .json · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
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