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

8.6 highEPSS 0.5%

High (8.6) in progress software telerik ui for asp.net mvc. EPSS 0.5% estimated probability of exploitation activity in the next 30 days.

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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`.

Severity

CVSS 3.1

8.6 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS
0.5% estimated probability of exploitation activity in the next 30 days; 43rd percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CWEs
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)
CWE-401 Missing Release of Memory after Effective Lifetime
OWASP Top 10
A06:2025 Insecure Design
Published
Modified
Assigned by
ProgressSoftware (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

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Affected

  • progress software:telerik ui for asp.net mvc

Versions

From the CNA's record in the CVE List.

ProductAffected
Progress Software Telerik UI for ASP.NET MVCfrom 2012.2.710 before 2026.3.1015

Attack patterns (CAPEC)

  • CAPEC-26 Leveraging Race Conditions Likelihood: High · Severity: High
  • CAPEC-29 Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions Likelihood: High · Severity: High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

References

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