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Telerik UI for ASP.NET AJAX chunked upload flaw lets attackers bypass size limits and exhaust disk space

Status: UPDATED  |  Advisory ID: CVE-2026-6022

Key Details

CVECVE-2026-6022
CVSS Score / Version7.5 (High) / CVSS v3.1
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Proseattack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is none; integrity impact is none; availability impact is high.
Affected productsProgress telerik_ui_for_asp.net_ajax
Classified asCWE-400 (Uncontrolled Resource Consumption)
Exploitation prediction (EPSS)0.29% probability of exploitation in the next 30 days (22% percentile) -- FIRST.org's EPSS model.

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
Progresstelerik_ui_for_asp.net_ajax
SubsystemsGeneral OT
SectorsMultiple

What to Know

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.

What to Do

Monitor Progress's web page for any future patch releases. See vendor advisory link below.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-6022
Vendor advisoryhttps://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-uncontrolled-resource-consumption-cve-2026-6022