CVE-2026-124689 Cross-Site Scripting in Kendo UI for jQuery ActionSheet Header Labels
Attackers influencing ActionSheet title, subtitle or header labels can inject JavaScript that runs when users open the sheet in apps using Kendo UI.
- 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
- Harmful if only installed
- No
- Needs a specific call
- Yes
- Fix
- None listed
What is CVE-2026-124689?
CVE-2026-124689 is a high-severity cross-site scripting vulnerability in Progress Software Kendo UI for jQuery, published on 11 Nov 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 2026.3.1014 up to, but not including, 2026.4.1110, ActionSheet does not encode title, subtitle, and header button label values before rendering them. An attacker who can influence these values can inject markup that executes as JavaScript when a user opens the ActionSheet. Successful exploitation may compromise the confidentiality and integrity of data available in the user's browser context. The report identifies version 2026.3.1014; the first affected release has not been established.
Weakness: CWE-79
Which versions are affected by CVE-2026-124689?
An affected version is only exploitable if your software calls ActionSheet. Many projects that include it are not exposed.
How do I fix CVE-2026-124689?
No fix has been published for CVE-2026-124689 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-2026-124689 being exploited?
There is no known exploitation of CVE-2026-124689 in the wild and no public exploit code.
Sources
Also known as GHSA-rh5h-75wf-2hwp.