# CVE-2026-124686: JavaScript Code Injection through kendo.init() in Kendo UI for jQuery

> Low-privileged attackers controlling data attributes can inject JavaScript via kendo.init() in Kendo UI for jQuery, compromising user data.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **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
- **Harmful if only installed:** No
- **Needs a specific call:** Yes (`kendo.init()`)
- **Fix available:** No
- **Published:** 11 Nov 2026
- **Updated:** 11 Nov 2026
- **Also known as:** GHSA-rjfx-524j-r2fc

## What is CVE-2026-124686?

CVE-2026-124686 is a medium-severity code injection vulnerability in Progress Software Kendo UI for jQuery, published on 11 Nov 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 prior to 2026.4.1111, kendo.init() compiles data-* attribute values with new Function when an invalid JSON object is supplied. An attacker with low privileges who can control these attribute values can inject JavaScript that executes during declarative widget initialization when a user loads or interacts with an affected page. Successful exploitation can compromise the confidentiality and integrity of data accessible in the user's browser context. The issue was reported in version 2022.3.1109; the first affected release has not been established.

Weakness: CWE-95 (Improper Neutralization of Directives in Dynamically Evaluated Code)

## Which versions are affected by CVE-2026-124686?

An affected version is only exploitable if your software calls kendo.init(). Many projects that include it are not exposed.


## How do I fix CVE-2026-124686?

No fix has been published for CVE-2026-124686 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-124686 being exploited?

There is no known exploitation of CVE-2026-124686 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-124686 and fix it if it is affected.

What it is: CVE-2026-124686 is a medium-severity code injection vulnerability in Progress Software Kendo UI for jQuery, published on 11 Nov 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-124686 in the wild and no public exploit code.
Exposure: An affected version is only exploitable if your software calls kendo.init(). 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 kendo.init() 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-2026-124686/ (Markdown: https://insights.sbomify.com/CVE-2026-124686/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-124686
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-124686
- OSV: https://osv.dev/vulnerability/CVE-2026-124686

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-124686/
Summaries are generated and may contain mistakes; the official description above is the record.