EUVD-2026-24631
GHSA-vf2r-6g4x-jc4h
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
7DescriptionCVE.org
In Progress® Telerik® UI for AJAX prior to 2026.1.421, RadAsyncUpload contains an uncontrolled resource consumption vulnerability that allows file uploads to exceed the configured maximum size due to missing cumulative size enforcement during chunk reassembly, leading to disk space exhaustion.
AnalysisAI
Uncontrolled resource consumption in Progress Telerik UI for AJAX RadAsyncUpload component allows remote unauthenticated attackers to exhaust disk space by uploading files exceeding configured size limits through chunked upload bypass. The vulnerability arises from missing cumulative size validation during chunk reassembly, enabling attackers to circumvent intended upload restrictions. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Applications using Progress Telerik UI for AJAX versions prior to 2026.1.421 with RadAsyncUpload component enabled and accessible via network-exposed endpoints. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.5 (High) reflects significant availability impact with maximum attack convenience (network vector, low complexity, no authentication, no user interaction). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker identifies an internet-facing ASP.NET application using Telerik RadAsyncUpload by fingerprinting HTTP endpoints (common paths include /Telerik.Web.UI.WebResource.axd). The attacker crafts HTTP POST requests containing file chunks, intentionally splitting a multi-gigabyte payload into segments that individually fall below the configured MaxFileSize limit (e.g., 100MB file split into 200 x 500KB chunks). … |
| Remediation | Upgrade to Progress Telerik UI for AJAX version 2026.1.421 or later, which implements cumulative size validation during chunk reassembly to prevent bypass of configured upload limits. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all applications using Progress Telerik UI for AJAX and document current RadAsyncUpload component versions. …
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External POC / Exploit Code
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