What is CVE-2026-14865?

CVE-2026-14865 is a medium-severity vulnerability in Progress Software Telerik Ui For Asp.net Ajax, classified under Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion). CVSS score: 5.3/10. Published 2026-07-22.

How severe is CVE-2026-14865?

Medium severity. CVSS v3 base score is 5.3 out of 10.

XXE in Progress Software Telerik Ui For Asp.net Ajax

CVE-2026-14865

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.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Progress Software Telerik Ui For Asp.net Ajax — versions 2009.1.314

Weakness classification (CWE)

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

References

security@progress.com (vendor-advisory)

Frequently asked questions

What is CVE-2026-14865?: CVE-2026-14865 is a medium-severity vulnerability in Progress Software Telerik Ui For Asp.net Ajax, classified under Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion). CVSS score: 5.3/10. Published 2026-07-22.
How severe is CVE-2026-14865?: Medium severity. CVSS v3 base score is 5.3 out of 10.