CVE-2026-13182

High

Description

In Progress® Telerik® UI for AJAX prior to v2026.2.708, RadAsyncUpload client-state processing can distinguish decrypt failures from invalid-JSON parse failures, creating an oracle that reveals protected metadata values to remote attackers.

SeverityHigh

CVSS7.5

Exploit probability—

Product

Progress Telerik Ui For Asp.net Ajax

PublishedJul 22, 2026

First seenJul 22, 2026

Weakness typeCWE-209CWE-209

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-padding-oracle-cve-2026-13182

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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