Uncaught Exceptions in Telerik UI for ASP.NET MVC Filter Processing

published 2026-11-12 2d ago modified 2026-11-12 2d ago also EUVD-2026-124561

cvss: 8.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits: 0; none known

In Progress® Telerik® UI for ASP.NET MVC versions `2012.2.710` through `2026.3.1015`, server-side filter processing does not properly validate descriptor types, null values, or stack state in FilterNodeVisitor and does not catch FilterParserException within the affected assembly. An unauthenticated remote attacker can exploit this if the application exposes an endpoint reachable without authentication that accepts crafted filter parameters. Affected requests can trigger uncaught cast, null-reference, or empty-stack exceptions and return HTTP 500. The report does not demonstrate worker-process termination or disruption of unrelated requests. The issue is fixed in version `2026.4.1111`.

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Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-14).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Affected products

Progress Software Telerik UI for ASP.NET MVC

Classification

Weakness

CWE-248 Uncaught Exception

References

telerik.com /aspnet-mvc/documentation/knowledge-base/kb-security-filter-processing-cve-2026-106146
vendor-advisory

Sources

CVE List CVE-2026-106146
NVD CVE-2026-106146

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