---
id: "CVE-2026-124686"
page: "https://infrastack.ai/live/CVE-2026-124686"
kind: "vulnerability"
aliases: ["CVE-2026-124686"]
title: "Kendo UI for jQuery: data attributes can run injected JavaScript in browsers"
severity: "medium"
cvss: 5.4
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["front-end", "javascript", "jquery", "kendo-ui", "package"]
not_affected_if: ["no-kendo-ui-jquery", "no-user-controlled-data-attributes"]
published_at: "2026-11-11T16:17:25+00:00"
first_seen_at: "2026-11-11T16:28:06+00:00"
updated_at: "2026-11-11T16:30:04+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124686", "first_seen_at": "2026-11-11T16:28:06+00:00"}]
exploit_sources: []
---

# Kendo UI for jQuery: data attributes can run injected JavaScript in browsers

Link for people: https://infrastack.ai/live/CVE-2026-124686 (this .md is for agents)

Kendo UI for jQuery's kendo.init() passes data-* attribute values to new Function when the JSON is invalid, so attacker-controlled attribute text runs as JavaScript. An attacker with low privileges who can set those attributes can read or change data in the victim's browser session when the page loads or is used.

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

## How to check

- Find the Kendo UI for jQuery version in the project's `package.json` or the bundled kendo files and compare it with the fixed version below.
- Search the front-end code for `kendo.init(` or `data-role` attributes filled with user-supplied content.

## Fix

- Kendo UI for jQuery: move to `2026.4.1111` or later.

## Timeline

- 2026-11-11T16:28:06+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124686

## From the sources

In Progress® Kendo® UI for jQuery versions prior to 2026.4.1111, kendo.init() compiles data-* attribute values with new Function when an invalid JSON object is supplied. An attacker with low privileges who can control these attribute values can inject JavaScript that executes during declarative widget initialization when a user loads or interacts with an affected page. Successful exploitation can compromise the confidentiality and integrity of data accessible in the user's browser context. The issue was reported in version 2022.3.1109; the first affected release has not been established.

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