CVE-2026-13183

RadAsyncUpload Upload Metadata Timing Oracle Vulnerability in Telerik UI for ASP.NET AJAX

State: Published
Severity: 7.5 High
Published: Jul 22, 2026
Updated: Jul 22, 2026
Reserved: Jun 24, 2026

Description

In Progress® Telerik® UI for AJAX prior to v2026.2.708, RadAsyncUpload upload metadata processing may leak cryptographic validity through measurable timing differences, enabling remote attackers to recover protected metadata values.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	ProgressSoftware

Weaknesses

CWE-208 Observable Timing Discrepancy

Affected Products

Product	Versions
Telerik UI for ASP.NET AJAXProgress Software	2010.1.309 to before 2026.2.708Affected

References

https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-rau-timing-oracle-CVE-2026-13183vendor-advisory

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