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TI-2026-12533 Aliases CVE-2026-14865GHSA-8qxm-qvqw-xx9r

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

Priority LOW 30CWE-776Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00432 37th percentileScored 2026-11-07
Fix Fixed Telerik UI for ASP.NET AJAX (Progress Software): 2026.2.708

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ProgressTelerik UI for ASP.NET AJAX2009.1.314 to before 2026.2.7082026.2.708Patch availableCNA
  • Telerik UI for ASP.NET AJAX VendorProgress Affected 2009.1.314 to before 2026.2.708 Fixed in 2026.2.708 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:progress:telerik_ui_for_asp.net_ajax:*:*:*:*:*:*:*:*2009.31314 to before 2026.2.708VulnerableProgress
  • cpe:2.3:a:progress:telerik_ui_for_asp.net_ajax:*:*:*:*:*:*:*:* Versions 2009.31314 to before 2026.2.708 Vulnerable ·Progress

Remediation

  • Fix · CNA Telerik UI for ASP.NET AJAX (Progress Software) Fixed in 2026.2.708

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Progress Software Telerik UI for ASP.NET AJAX 2026.2.708

    13 records Highest priority Priority LOW 13 LOW

    Other records, highest priority first

    • TI-2026-11200 SpellChecker DictionaryLanguage Path Traversal Vulnerability in Telerik UI for ASP.NET AJAXPriority LOW 39
    • TI-2026-11197 AppDataStorageProvider Path Traversal Deserialization Vulnerability in Telerik UI for ASP.NET AJAXPriority LOW 39
    • TI-2026-11195 RadAsyncUpload Default HMAC Key Fallback Vulnerability in Telerik UI for ASP.NET AJAXPriority LOW 39
    Show all 13 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-14865
  2. 2026-10-03 Alias added: GHSA-8qxm-qvqw-xx9r

References

Advisory 1

  • TI-2017-08395 Progress Telerik UI for ASP.NET AJAX before R2 2017 SP2 does not properly restrict user… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-03167 Unsafe Reflection Vulnerability in Telerik UI for ASP.NET AJAX CVSS 3.1HIGH 7.5
  • TI-2019-14262 Path traversal in RadChart in Telerik UI for ASP.NET AJAX allows a remote attacker to… CVSS 3.1CRITICAL 9.8
  • TI-2021-09372 An issue was discovered in Progress Telerik UI for ASP.NET AJAX 2021.1.224. CVSS 3.1CRITICAL 9.8
  • TI-2026-05284 Deserialization of Untrusted Data Vulnerability in Telerik UI for ASP.NET AJAX CVSS 3.1CRITICAL 9.8
  • TI-2014-01755 Absolute path traversal vulnerability in the RadAsyncUpload control in the RadControls in… CVSS 2.0HIGH 7.5
See all 20 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences