CVE-2026-13187 DialogHandler Provider Type Tampering Vulnerability in Telerik UI for ASP.NET AJAX

High 8.1 Published 22 Jul 2026 Updated 24 Jul 2026

Attackers can tamper with DialogHandler provider types to alter dialog processing, potentially enabling chained exploitation in Telerik UI for ASP.NET AJAX.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-13187?

CVE-2026-13187 is a high-severity code injection vulnerability in Progress Software Telerik UI for ASP.NET AJAX, published on 22 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-470

Which versions are affected by CVE-2026-13187?

It affects 1 product.

Products include Progress Telerik Ui for Asp.net Ajax.

How do I fix CVE-2026-13187?

No fix has been published for CVE-2026-13187 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2026-13187 being exploited?

There is no known exploitation of CVE-2026-13187 in the wild and no public exploit code.

Sources

Also known as GHSA-jpmx-7c66-9jwf.