CVE-2026-14865

Medium

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.

SeverityMedium

CVSS5.3

Exploit probability—

Product

Progress Telerik Ui For Asp.net Ajax

PublishedJul 22, 2026

First seenJul 22, 2026

Weakness typeCWE-776CWE-776

How to fix

Update

progress telerik_ui_for_asp.net_ajax2026.2.708 or later

Vendor advisories

telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-rlb-xxe-injection-client-state-cve-2026-14865

Affected products

Product	Affected versions	Fixed in
progress telerik_ui_for_asp.net_ajax	2009.31314 ≤ v < 2026.2.708	2026.2.708

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