CVE-2026-106153 Cross-site Scripting (XSS) in Kendo UI for jQuery Calendar and MultiViewCalendar

Medium 5.4 Published 15 Oct 2026 Updated 15 Oct 2026

Attackers can inject malicious scripts into Kendo UI Calendar components via unsanitized URLs or titles, executing code in user browsers.

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

What is CVE-2026-106153?

CVE-2026-106153 is a medium-severity cross-site scripting vulnerability in Progress Software Kendo UI for jQuery, published on 15 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

In Progress® Kendo® UI for jQuery prior to version 2026.3.1015, the Calendar and MultiViewCalendar month content templates render data.url and data.title without proper URL sanitization and HTML attribute encoding. An attacker with low privileges who can control the URL option or culture-derived title values can supply a JavaScript URL or inject event-handler attributes. When a user interacts with an affected calendar, JavaScript can execute in the user's browser context and compromise the confidentiality and integrity of accessible data.

Weakness: CWE-79

Which versions are affected by CVE-2026-106153?

It affects 1 product.

Products include Progress Kendo Ui.

How do I fix CVE-2026-106153?

No fix has been published for CVE-2026-106153 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-2026-106153 being exploited?

There is no known exploitation of CVE-2026-106153 in the wild and no public exploit code.

Sources

Also known as GHSA-v48m-g69m-grg8.