Medium · 5.9 CVE-2026-13188 EUVD-2026-47693GHSA-gggw-r635-4jx6

DialogHandler Parameters Tampering Vulnerability 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, DialogHandler request parameters may be tampered with, potentially altering dialog server-side behavior and enabling chained exploitation.

Affected products

Vendor	Product	Affected	Fixed
Progress Software	Telerik UI for ASP.NET AJAX	2011.2.712 – < 2026.2.708	2026.2.708

References

https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-dialoghandler-parameters-tampering-CVE-2026-13188 vendor-advisory