CVE-2026-124688
Cross-Site Scripting via the spriteCssClass Field in Kendo UI for jQuery
In Progress® Kendo® UI for jQuery prior to 2026.4.1111 the TabStrip, PanelBar, and Menu widgets support mapping a dataSource field to `spriteCssClass`. If an attacker can control the mapped data, they can break out of the attribute and inject markup, including event-handler attributes. The resulting JavaScript executes in the application's origin when a victim loads a page that renders the affected widget, allowing access to data and actions available in the victim's authenticated session.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Kendo UI for jQuery Progress Software |
≥ 2012.1.322; < 2026.4.1111 (affected, custom)
Other versions: unaffected |
CNA: ProgressSoftware |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.1 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L | CNA: ProgressSoftware |
| 3.1 / 7.1 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/kb-security-tabstrip-panelbar-menu-spritecssclass-xss-cve-2026-124688CNA: ProgressSoftware · vendor-advisory
- https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/kb-security-tabstrip-panelbar-menu-spritecssclass-xss-cve-2026-124688[email protected]
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