Vulnerability · Published Jul 22, 2026 · Assigned by ProgressSoftware
CVE-2026-13189SpellChecker DictionaryLanguage Path Traversal Vulnerability in Telerik UI for ASP.NET AJAX
High 7.5
In plain English
A high-severity security flaw in Telerik UI for ASP.NET AJAX from Progress Software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 70.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Progress Software | Telerik UI for ASP.NET AJAX | 2011.2.712 – before 2026.2.708 |
Weakness: CWE-36 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N