CVE-2026-14865

XXE Denial of Service via RadLayoutBuilder Client State in Telerik UI for ASP.NET AJAX

State: Published
Severity: 5.3 Medium
Published: Jul 22, 2026
Updated: Jul 22, 2026
Reserved: Jul 6, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	ProgressSoftware

Weaknesses

CWE-776 Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

Affected Products

Product	Versions
Telerik UI for ASP.NET AJAXProgress Software	2009.1.314 to before 2026.2.708Affected

References

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

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