CVE-2026-13188 DialogHandler Parameters Tampering Vulnerability in Telerik UI for ASP.NET AJAX
Attackers can tamper with DialogHandler parameters to alter server-side behavior, 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-2026-13188?
CVE-2026-13188 is a medium-severity 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 request parameters may be tampered with, potentially altering dialog server-side behavior and enabling chained exploitation.
Weakness: CWE-345
Which versions are affected by CVE-2026-13188?
It affects 1 product.
Products include Progress Telerik Ui for Asp.net Ajax.
How do I fix CVE-2026-13188?
No fix has been published for CVE-2026-13188 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-13188 being exploited?
There is no known exploitation of CVE-2026-13188 in the wild and no public exploit code.
Other vulnerabilities in Progress Software Telerik UI for ASP.NET AJAX
- CVE-2017-11357 Telerik UI for ASP.NET AJAX Insecure Direct Object Reference
- CVE-2021-28141 Missing authorization in n/a
- CVE-2019-19790 Path traversal in n/a
- CVE-2026-13181 RadAsyncUpload AsyncUploadTypeName Type Resolution Vulnerability in Telerik UI for ASP.NET AJAX
- CVE-2026-13185 PersistenceFramework Cookie Deserialization Vulnerability in Telerik UI for ASP.NET AJAX
Sources
Also known as GHSA-gggw-r635-4jx6.