CVE-2026-14865 XXE Denial of Service via RadLayoutBuilder Client State in Telerik UI for ASP.NET AJAX
Unauthenticated attackers can cause denial of service via recursive XML entity expansion in the RadLayoutBuilder control.
- 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-2026-14865?
CVE-2026-14865 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, the internal LayoutBuilder control processes client-state XML without disabling DTD processing, allowing unauthenticated denial of service via recursive XML entity expansion.
Weakness: CWE-776
Which versions are affected by CVE-2026-14865?
It affects 1 product.
Products include Progress Telerik Ui for Asp.net Ajax.
How do I fix CVE-2026-14865?
No fix has been published for CVE-2026-14865 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-14865 being exploited?
There is no known exploitation of CVE-2026-14865 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-8qxm-qvqw-xx9r.