Medium · 5.3 CVE-2026-14865 EUVD-2026-47698GHSA-8qxm-qvqw-xx9r

XXE Denial of Service via RadLayoutBuilder Client State in Telerik UI for ASP.NET AJAX

Published Jul 22, 2026 · Updated Jul 22, 2026 · Assigned by ProgressSoftware

Vendor: Progress Software Product: Telerik UI for ASP.NET AJAX

Description

In Progress® Telerik® UI for AJAX prior to v2026.2.708, the internal LayoutBuilder control processes client-state XML without disabling DTD processing, allowing unauthenticated denial of service via recursive XML entity expansion.

Affected products

Vendor	Product	Affected	Fixed
Progress Software	Telerik UI for ASP.NET AJAX	2009.1.314 – < 2026.2.708	2026.2.708

References

https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-rlb-xxe-injection-client-state-cve-2026-14865 vendor-advisory