High · 7.5 CVE-2026-13182 EUVD-2026-47687GHSA-h9g3-2g32-4pqc

RadAsyncUpload Client-State Decrypt-vs-Parse Oracle 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, RadAsyncUpload client-state processing can distinguish decrypt failures from invalid-JSON parse failures, creating an oracle that reveals protected metadata values to remote attackers.

Affected products

Vendor	Product	Affected	Fixed
Progress Software	Telerik UI for ASP.NET AJAX	2010.1.309 – < 2026.2.708	2026.2.708

References

https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-rau-padding-oracle-cve-2026-13182 vendor-advisory