CVE-2026-13187 PUBLISHED

DialogHandler Provider Type Tampering Vulnerability in Telerik UI for ASP.NET AJAX

Assigner: ProgressSoftware
Reserved: 24.06.2026 Published: 22.07.2026 Updated: 22.07.2026

In Progress® Telerik® UI for AJAX prior to v2026.2.708, DialogHandler provider type input may be tampered with, potentially altering dialog processing and enabling chained exploitation.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 8.1

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Progress Software
Product	Telerik UI for ASP.NET AJAX
Versions	Default: unaffected affected from 2011.2.712 to 2026.2.708 (excl.)

Credits

Marcio Almeida of TantoSec finder

References

https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-dialoghandler-provider-type-tampering-CVE-2026-13187

Problem Types

CWE-470 Use of Externally-Controlled Input to Select Classes or Code CWE

Impacts

CAPEC-586 Object Injection