# CVE-2026-124691: Cross-Site Scripting in Kendo UI for jQuery Gantt Parent Dropdown

> Attackers who influence task titles can run JavaScript in users' browsers via the Kendo UI Gantt task editor Parent dropdown.

- **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:** No
- **Fix available:** No
- **Published:** 12 Nov 2026
- **Updated:** 12 Nov 2026
- **Also known as:** GHSA-9hhv-8r66-23qv

## What is CVE-2026-124691?

CVE-2026-124691 is a high-severity cross-site scripting vulnerability in Progress Software Kendo UI for jQuery, published on 12 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 Gantt, the task editor's Parent dropdown renders task titles as HTML. An attacker who can influence a task title shown in the dropdown can cause attacker-controlled markup to execute as JavaScript when a user opens or interacts with the task editor. Successful exploitation may compromise the confidentiality and integrity of data available in the user's browser context. The first affected version is 2020.3.915; the latest vulnerable version is 2026.3.1015. The issue is fixed in version 2026.4.1111.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-124691?

An affected version is exposed as installed. No special setting or call is needed.


## How do I fix CVE-2026-124691?

No fix has been published for CVE-2026-124691 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-124691 being exploited?

There is no known exploitation of CVE-2026-124691 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-124691 and fix it if it is affected.

What it is: CVE-2026-124691 is a high-severity cross-site scripting vulnerability in Progress Software Kendo UI for jQuery, published on 12 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-2026-124691 in the wild and no public exploit code.
Exposure: An affected version is exposed as installed. No special setting or call is needed.

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.
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-2026-124691/ (Markdown: https://insights.sbomify.com/CVE-2026-124691/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-124691
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-124691
- OSV: https://osv.dev/vulnerability/CVE-2026-124691

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-124691/
Summaries are generated and may contain mistakes; the official description above is the record.