CVE-2026-106159 Cross-Site Scripting via ToolBar ButtonGroup URLs in Kendo UI for jQuery

Medium 4.7 Published 15 Oct 2026 Updated 15 Oct 2026

Attackers can execute JavaScript in user browsers via malicious URLs in Kendo UI ToolBar ButtonGroups, compromising data confidentiality and integrity.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-106159?

CVE-2026-106159 is a medium-severity cross-site scripting vulnerability in Progress Software Kendo UI for jQuery, published on 15 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

In Progress® Kendo® UI for jQuery versions starting with 2022.3.1109 and prior to 2026.3.1015, ToolBar ButtonGroup button URLs are concatenated into an unquoted href attribute after URL sanitization. An attacker who can control a button URL can supply an otherwise allowed HTTPS URL containing whitespace and additional attributes, including an event handler, and execute JavaScript in a user's browser when the affected button is interacted with. Successful exploitation can compromise the confidentiality and integrity of data accessible to the affected application. This issue is fixed in version 2026.3.1015.

Weakness: CWE-80

Which versions are affected by CVE-2026-106159?

It affects 1 product.

Products include Progress Kendo Ui.

How do I fix CVE-2026-106159?

No fix has been published for CVE-2026-106159 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-106159 being exploited?

There is no known exploitation of CVE-2026-106159 in the wild and no public exploit code.

Sources

Also known as GHSA-qr78-p3rw-qmj2.