{"api_version":"1","generated_at":"2026-11-13T08:31:12+00:00","cve":"CVE-2026-106137","urls":{"html":"https://cve.report/CVE-2026-106137","api":"https://cve.report/api/cve/CVE-2026-106137.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-106137","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-106137"},"summary":{"title":"ClassFactory Race Condition and Retained Assembly Memory in Telerik UI for ASP.NET MVC","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`.","state":"PUBLISHED","assigner":"ProgressSoftware","published_at":"2026-11-11 18:18:24","updated_at":"2026-11-12 19:02:35"},"problem_types":["CWE-362","CWE-401","CWE-362 CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","CWE-401 CWE-401 Missing Release of Memory after Effective Lifetime"],"metrics":[{"version":"3.1","source":"security@progress.com","type":"Secondary","score":"8.6","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","baseScore":8.6,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"8.6","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.6,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://www.telerik.com/aspnet-mvc/documentation/knowledge-base/kb-security-class-factory-cve-2026-106137","name":"https://www.telerik.com/aspnet-mvc/documentation/knowledge-base/kb-security-class-factory-cve-2026-106137","refsource":"security@progress.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-106137","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106137","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Progress Software","product":"Telerik UI for ASP.NET MVC","version":"affected 2012.2.710 2026.3.1015 custom","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"106137","cve":"CVE-2026-106137","epss":"0.004930000","percentile":"0.428850000","score_date":"2026-11-12","updated_at":"2026-11-13 00:14:36"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unknown","product":"Telerik UI for ASP.NET MVC","vendor":"Progress Software","versions":[{"lessThan":"2026.3.1015","status":"affected","version":"2012.2.710","versionType":"custom"}]}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>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`.</p>"}],"value":"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`."}],"impacts":[{"descriptions":[{"lang":"en","value":"Leveraging Race Conditions"}]},{"descriptions":[{"lang":"en","value":"Excessive Allocation"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.6,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-362","description":"CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","lang":"en","type":"CWE"},{"cweId":"CWE-401","description":"CWE-401 Missing Release of Memory after Effective Lifetime","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-11-11T17:29:12.021Z","orgId":"f9fea0b6-671e-4eea-8fde-31911902ae05","shortName":"ProgressSoftware"},"references":[{"tags":["vendor-advisory"],"url":"https://www.telerik.com/aspnet-mvc/documentation/knowledge-base/kb-security-class-factory-cve-2026-106137"}],"source":{"discovery":"INTERNAL"},"title":"ClassFactory Race Condition and Retained Assembly Memory in Telerik UI for ASP.NET MVC","x_generator":{"engine":"Vulnogram 0.2.0"}}},"cveMetadata":{"assignerOrgId":"f9fea0b6-671e-4eea-8fde-31911902ae05","assignerShortName":"ProgressSoftware","cveId":"CVE-2026-106137","datePublished":"2026-11-11T17:29:12.021Z","dateReserved":"2026-10-06T15:51:10.391Z","dateUpdated":"2026-11-11T17:29:12.021Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-11-11 18:18:24","lastModifiedDate":"2026-11-12 19:02:35","problem_types":["CWE-362","CWE-401","CWE-362 CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","CWE-401 CWE-401 Missing Release of Memory after Effective Lifetime"],"metrics":{"cvssMetricV31":[{"source":"security@progress.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","baseScore":8.6,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":4}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"106137","Ordinal":"1","Title":"ClassFactory Race Condition and Retained Assembly Memory in Tele","CVE":"CVE-2026-106137","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"106137","Ordinal":"1","NoteData":"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`.","Type":"Description","Title":"ClassFactory Race Condition and Retained Assembly Memory in Tele"}]}}}