Timing Oracle Vulnerability in Telerik UI for AJAX by Progress Software
CVE-2026-13183

7.5HIGH

Key Information:

Vendor

Progress Software
Status
Telerik Ui For Asp.net Ajax
Vendor
CVE Published:
22 July 2026

What is CVE-2026-13183?

The Telerik UI for AJAX component from Progress Software contains a vulnerability where RadAsyncUpload processes upload metadata in a way that may expose cryptographic validity due to measurable timing differences. This flaw allows remote attackers to exploit these timing discrepancies to infer protected metadata values, potentially compromising sensitive information.

Affected Version(s)

Telerik UI for ASP.NET AJAX 2010.1.309 < 2026.2.708

References

https://www.telerik.com/products/aspnet-ajax/documentatio...
vendor-advisory

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Marcio Almeida of TantoSec
Justin Steven of TantoSec
.