# CVE-2026-124687: Progress Kendo UI for jQuery markup injection in DropDownButton and SplitButton

Source: https://junglewise.ai/threats/cve-2026-124687-in-progress-kendo-ui-for-jquery-versions-from-2022-2-621-prior  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-11. Updated: 2026-11-11  
License: CC BY 4.0 with a link back

CVE-2026-124687 · Severity: high · CVSS 7.1 · Published 2026-11-11

Progress Kendo UI for jQuery is a JavaScript UI component library used to build interactive web applications. Versions from 2022.2.621 through 2026.4.1110 contain a markup injection vulnerability in the DropDownButton and SplitButton components that allows attackers to inject malicious HTML and event handlers through the id and target attributes. An attacker who can control these attributes—such as through user input or data sources—could break out of attribute context and execute arbitrary JavaScript in victims' browsers.

Technologies: [Progress Kendo UI for jQuery](https://junglewise.ai/threats/technologies/kendo-ui-for-jquery). Vendors: [Progress](https://junglewise.ai/threats/vendors/progress).

## Quick answers

**Is CVE-2026-124687 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-124687 being exploited in the wild.

**How severe is CVE-2026-124687?** High severity, with a CVSS score of 7.1, published 11 November 2026.

**Which products and versions are affected?** Progress Kendo UI for jQuery 2022.2.621 through 2026.4.1110.

**Is there a fix for CVE-2026-124687?** Yes: fixed in 2026.4.1111. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-124687 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-124687?** Check whether you run Progress Kendo UI for jQuery at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 2026.4.1111

## Technical details

The vulnerability is a markup injection (HTML/attribute injection leading to XSS) in the DropDownButton and SplitButton components of Kendo UI for jQuery. It affects versions 2022.2.621 through 2026.4.1110 where unsanitized id and target attribute values are rendered into the DOM. An attacker who can influence the item configuration for these buttons can break out of attribute context and inject malicious markup including event handlers, leading to stored or reflected cross-site scripting (XSS).

## Affected products

- Progress Kendo UI for jQuery 2022.2.621 through 2026.4.1110

## Timeline

- 2026-11-11: disclosed

## References

- [https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/kb-security-dropdownbutton-splitbutton-items-attribute-xss-cve-2026-124687](https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/kb-security-dropdownbutton-splitbutton-items-attribute-xss-cve-2026-124687)

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