# 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.

- **Severity:** High 7.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L`)
- **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 (`ActionSheet`)
- **Fix available:** No
- **Published:** 11 Nov 2026
- **Updated:** 11 Nov 2026
- **Also known as:** GHSA-rh5h-75wf-2hwp

## 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 (Improper Neutralization of Input During Web Page Generation)

## 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.

## Is CVE-2026-124689 being exploited?

There is no known exploitation of CVE-2026-124689 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-124689 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-124689 in the wild and no public exploit code.
Exposure: An affected version is only exploitable if your software calls ActionSheet. Many projects that include it are not exposed.

Affected product: Progress Software Kendo UI for jQuery. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
   If an affected version is present, also search the code for calls to ActionSheet and report whether any exist.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-124689/ (Markdown: https://insights.sbomify.com/CVE-2026-124689/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-124689
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-124689
- OSV: https://osv.dev/vulnerability/CVE-2026-124689

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-124689/
Summaries are generated and may contain mistakes; the official description above is the record.