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Cross-Site Scripting via DropDownButton and SplitButton Item Attributes in Kendo UI for jQuery (CVE-2026-124687)

Updated on Nov 11, 2026

Description

October 2026 - CVE-2026-124687

Progress® Kendo® UI for jQuery versions prior to 2026.4.1111.

In Progress® Kendo® UI for jQuery versions from 2022.2.621 prior to 2026.4.1111 the DropDownButton and SplitButton allow markup injection through the id and target attributes. An attacker who can influence these item values can break out of the attributes and inject markup, including event handlers. The issue is fixed in 2026.4.1111.

Is My Application Vulnerable?

Your application may be vulnerable if it uses an affected version of DropDownButton or SplitButton and derives item IDs or attributes from attacker-controlled or lower-privileged input.

Issue

CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CAPEC-18: XSS Targeting Non-Script Elements

Solution

Upgrade to the fixed version listed below as soon as it becomes available.

Current Version	Update to
`>=2022.2.621` && `<=2026.3.1015`	`2026.4.1111` or later

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 questions or concerns about 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 Abhishek Nandkumar Bhaskar (Abhi-Hackz) for their responsible disclosure and cooperation.

External References

CVE-2026-124687 (MEDIUM)

CVSS: 4.7

CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N.