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Vulnerability Details :

CVE-2026-14865

Summary
Assigner-ProgressSoftware
Assigner Org ID-f9fea0b6-671e-4eea-8fde-31911902ae05
Published At-22 Jul, 2026 | 13:45
Updated At-22 Jul, 2026 | 13:45
Rejected At-
Credits

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

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:ProgressSoftware
Assigner Org ID:f9fea0b6-671e-4eea-8fde-31911902ae05
Published At:22 Jul, 2026 | 13:45
Updated At:22 Jul, 2026 | 13:45
Rejected At:
▼CVE Numbering Authority (CNA)
XXE Denial of Service via RadLayoutBuilder Client State in Telerik UI for ASP.NET AJAX

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.

Affected Products
Vendor
Progress Software CorporationProgress Software
Product
Telerik UI for ASP.NET AJAX
Default Status
unaffected
Versions
Affected
  • From 2009.1.314 before 2026.2.708 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-776CWE-776 Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
Type: CWE
CWE ID: CWE-776
Description: CWE-776 Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
Metrics
VersionBase scoreBase severityVector
3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-197CAPEC-197 Exponential Data Expansion
CAPEC ID: CAPEC-197
Description: CAPEC-197 Exponential Data Expansion
Solutions
Configurations
Workarounds
Exploits
Credits
finder
Marcio Almeida of TantoSec
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-rlb-xxe-injection-client-state-cve-2026-14865
vendor-advisory
Hyperlink: https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-rlb-xxe-injection-client-state-cve-2026-14865
Resource:
vendor-advisory
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@progress.com
Published At:22 Jul, 2026 | 14:17
Updated At:22 Jul, 2026 | 20:16

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
N/A
Type: Secondary
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-776Secondarysecurity@progress.com
CWE ID: CWE-776
Type: Secondary
Source: security@progress.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-rlb-xxe-injection-client-state-cve-2026-14865security@progress.com
N/A
Hyperlink: https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-rlb-xxe-injection-client-state-cve-2026-14865
Source: security@progress.com
Resource: N/A

Change History

0
Information is not available yet

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Details not found