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  4. CVE 2026 106137 classfactory race condition and retained assembly
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Back to active CVEs
High · CVSS 8.6CVE-2026-106137

ClassFactory Race Condition and Retained Assembly Memory in Telerik UI for ASP.NET MVCCVE-2026-106137

Answer in brief

CVE-2026-106137 records a High severity (CVSS 8.6) vulnerability in ClassFactory Race Condition and Retained Assembly Memory in Telerik UI for ASP.NET MVC. The current sources do not mark it as known exploited. The current feed maps Progress Software/Telerik UI for ASP.NET MVC (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 11, 2026Updated Nov 11, 2026Source checked Nov 11, 2026First seen by HOL Nov 11, 2026Material review Nov 11, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.6
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Progress Software/Telerik UI for ASP.NET MVC (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Progress Software/Telerik UI for ASP.NET MVCgeneric>=2012.2.710 <2026.3.10152026.3.1015

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Progress Software/Telerik UI for ASP.NET MVC.
  2. 2Review the reported fix. Update Progress Software/Telerik UI for ASP.NET MVC to 2026.3.1015 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 11, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 11, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 11, 2026

Sources and claim methodology

  • Source referencetelerik.com
Upstream source description

In affected versions of Progress® Telerik® UI for ASP.NET MVC `2012.2.710` through `2026.3.811`, ClassFactory updates a shared class dictionary without exclusive write protection and emits non-collectible dynamic assemblies that remain loaded for the AppDomain's lifetime. The dictionary lookup and insertion are not atomic, and case variations in aggregate descriptors can produce distinct retained types even though member resolution is case-insensitive. An unauthenticated remote attacker can exploit this if the application exposes an aggregation endpoint that is reachable without authentication, by submitting concurrent or repeated crafted requests. These requests may corrupt dictionary state or increase CPU and memory use, potentially degrading availability. The issue is fixed in version `2026.3.1015`.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-362, CWE-401
Source
CVE List V5
Source checked
Nov 11, 2026
References
1 linked source
Open source record