Path Traversal Vulnerability in Progress Telerik UI for AJAX
CVE-2026-13189

7.5HIGH

Key Information:

Vendor

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

What is CVE-2026-13189?

A vulnerability exists in Progress Telerik UI for AJAX where inadequate validation of the language parameter in the spell check handler can allow attackers to manipulate server-side file path resolution. This could lead to unintended server-side requests being executed, potentially compromising the integrity and security of the server's file system.

Affected Version(s)

Telerik UI for ASP.NET AJAX 2011.2.712 < 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

Markus Wulftange with CODE WHITE GmbH
Marcio Almeida of TantoSec
.