---
id: "CVE-2026-124688"
page: "https://infrastack.ai/live/CVE-2026-124688"
kind: "vulnerability"
aliases: ["CVE-2026-124688"]
title: "Kendo UI for jQuery: widget data can inject script into pages"
severity: "high"
cvss: 7.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["front-end", "javascript", "jquery", "kendo-ui", "package"]
not_affected_if: ["no-kendo-widgets", "trusted-data-only"]
published_at: "2026-11-11T17:17:17+00:00"
first_seen_at: "2026-11-11T17:28:21+00:00"
updated_at: "2026-11-11T17:28:50+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124688", "first_seen_at": "2026-11-11T17:28:21+00:00"}]
exploit_sources: []
---

# Kendo UI for jQuery: widget data can inject script into pages

Link for people: https://infrastack.ai/live/CVE-2026-124688 (this .md is for agents)

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.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed `@progress/kendo-ui` or Kendo jQuery package version in `package.json` and lockfiles.
- Search front-end code for TabStrip, PanelBar or Menu widgets that map a dataSource field to `spriteCssClass`.

## Fix

- Move to Kendo UI for jQuery `2026.4.1111` or later.

## Timeline

- 2026-11-11T17:28:21+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124688

## From the sources

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.

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