Cross-Site Scripting via the spriteCssClass Field in Kendo UI for jQuery

published 2026-11-11 17h ago modified 2026-11-11 16h ago also EUVD-2026-123598

cvss: 7.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: —; no EPSS score yet
public exploits: 0; none known

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.

Patch / fix

fixed in 1

Progress Software Kendo UI for jQuery 2026.4.1111

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CVSS scores

assigned by	version	score	vector
CNA	3.1	7.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Affected products

Progress Software Kendo UI for jQuery

Classification

Weakness

CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page

References

telerik.com /kendo-jquery-ui/documentation/knowledge-base/kb-security-tabstrip-panelbar-menu-spritecssclass-xss-cve-2026-1
vendor-advisory

Sources

CVE List CVE-2026-124688
NVD CVE-2026-124688

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