CVE-2026-13183

High

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.

SeverityHigh

CVSS7.5

Exploit probability43. percentile0.5%

Product

Progress Telerik Ui For Asp.net Ajax

PublishedJul 22, 2026

First seenJul 22, 2026

Weakness typeCWE-208CWE-208

How to fix

Update

progress telerik_ui_for_asp.net_ajax2026.2.708 or later

Vendor advisories

telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-rau-timing-oracle-CVE-2026-13183

Affected products

Product	Affected versions	Fixed in
progress telerik_ui_for_asp.net_ajax	2010.1309 ≤ v < 2026.2.708	2026.2.708

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