CVE-2026-106151 Cross-Site Scripting in Validator Validation Messages in Kendo UI for jQuery

Medium 5.4 Published 15 Oct 2026 Updated 15 Oct 2026

An attacker can execute JavaScript in a user's browser by modifying validation messages, compromising data confidentiality and integrity in applications using Kendo UI for jQuery.

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-2026-106151?

CVE-2026-106151 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 versions starting with 2012.2.710 and prior to 2026.3.1015, the Validator decodes validation messages from data-msg-* attributes and parses the resulting text as HTML. An attacker who can modify a validation message can cause HTML that was correctly escaped in the page attribute to become active markup, including event handlers, when the user triggers validation. Successful exploitation can execute JavaScript in a user's browser and 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-2026-106151?

It affects 1 product.

Products include Progress Kendo Ui.

How do I fix CVE-2026-106151?

No fix has been published for CVE-2026-106151 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-2026-106151 being exploited?

There is no known exploitation of CVE-2026-106151 in the wild and no public exploit code.

Sources

Also known as GHSA-47fh-6q7r-rmvx.