CVE-2026-106159: Cross-Site Scripting via ToolBar ButtonGroup URLs in Kendo UI for jQuery
In Progress® Kendo® UI for jQuery versions starting with 2022.3.1109 and prior to 2026.3.1015, ToolBar ButtonGroup button URLs are concatenated into an unquoted href attribute after URL sanitization. An attacker who can control a button URL can supply an otherwise allowed HTTPS URL containing whitespace and additional attributes, including an event handler, and execute JavaScript in a user's browser when the affected button is interacted with. Successful exploitation can compromise the confidentiality and integrity of data accessible to the affected application. This issue is fixed in version 2026.3.1015.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Progress Kendo UI for jQueryto a version that resolves this vulnerability.Fixed in 2026.3.1015
Event History
Frequently Asked Questions
Which deployments are exposed to this issue?
Deployments using Progress Kendo UI for jQuery from version 2022.3.1109 up to, but not including, 2026.3.1015 are affected when ToolBar ButtonGroup button URLs can be influenced by an attacker. The issue is fixed in 2026.3.1015.
What does an attacker need to exploit the vulnerability?
The attacker must be able to control a ToolBar ButtonGroup button URL. They can use an otherwise allowed HTTPS URL containing whitespace and injected attributes, including an event handler; a user must then interact with the affected button.
What is the likely impact of successful exploitation?
JavaScript can execute in the user's browser in the context of the affected application. This can compromise the confidentiality and integrity of data accessible to that application.