Cross-Site Scripting via PanelBar Item URLs in Kendo UI for jQuery (CVE-2026-106157)
Description
October 2026 - CVE-2026-106157
- Progress® Kendo® UI for jQuery 2026 Q3 (2026.3.811) or earlier.
What Are the Impacts
The PanelBar item template inserts the data source url value into a single-quoted href attribute without proper encoding. An attacker who can control an item URL can introduce additional attributes, including event handlers. JavaScript can execute in a user's browser when the user interacts with the affected item, compromising the confidentiality and integrity of data accessible to the affected application.
Is My Application Vulnerable?
Your application may be vulnerable if it uses an affected version and allows an attacker to control item url values in the PanelBar data source.
Issue
- CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
- CAPEC-18: XSS Targeting Non-Script Elements
Solution
We have addressed the issue and the Progress Telerik team strongly recommends performing an upgrade to the latest version listed in the table below.
| Current Version | Update to |
|---|---|
>= 2019.2.514 && < 2026.3.811 | >= 2026.3.1015 |
Follow the update instructions for precise instructions. All customers who have a license for Progress® Kendo® UI for jQuery can access their downloads here Product Downloads | Your Account.
Notes
- If you have any questions or concerns related to this issue, open a new Technical Support case in Your Account | Support Center. Technical Support is available to customers with an active support plan.
- We would like to thank komyeonghane320f9 for their responsible disclosure and cooperation.
External References
CVE-2026-106157 (Medium)
CVSS: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N (4.7)
In Progress® Kendo® UI for jQuery versions starting with 2019.2.514 and prior to 2026.3.811, the PanelBar component inserts data source item URL values into a single-quoted href attribute without proper encoding. An attacker who can control an item URL can inject additional HTML attributes, including event handlers, and execute JavaScript in a user's browser when the user interacts with the affected item. Successful exploitation can compromise the confidentiality and integrity of data accessible to the affected application. This issue is fixed in version 2026.3.1015.
Finder Credit: komyeonghane320f9