CVE-2026-13189

High

Description

In Progress® Telerik® UI for AJAX prior to v2026.2.708, insufficient validation of the language parameter in the spell check handler may allow an attacker to influence server-side file path resolution and trigger unintended server-side requests.

SeverityHigh

CVSS7.5

Exploit probability—

Product

Progress Telerik Ui For Asp.net Ajax

PublishedJul 22, 2026

First seenJul 22, 2026

Weakness typeCWE-36CWE-36

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-spellchecker-dictionarylanguage-path-traversal-CVE-2026-13189

Affected products

Product	Affected versions	Fixed in
progress telerik_ui_for_asp.net_ajax	2011.2712 ≤ v < 2026.2.708	2026.2.708

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