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

Status: published. Published: 2026-11-11. Updated: 2026-11-11.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Progress Software / Kendo UI for jQuery: ≥ 2022.3.1109; < 2026.4.1111 (affected, custom); 2026.4.1111 (unaffected). Source: CNA: ProgressSoftware

## Severity and prioritization

- CVSS 3.1: 5.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N; source: CNA: ProgressSoftware

- CVSS 3.1: 5.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N; source: NVD: security@progress.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-95

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/kb-security-kendo-init-code-injection-cve-2026-124686 (CNA: ProgressSoftware; vendor-advisory)

- https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/kb-security-kendo-init-code-injection-cve-2026-124686 (security@progress.com)

## Provenance

- CNA: ProgressSoftware: https://www.cve.org/CVERecord?id=CVE-2026-124686; retrieved 2026-11-11; source updated 2026-11-11

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-124686; retrieved 2026-11-11; source updated 2026-11-11

Revision: 2a476ca41f69e49172dc3e4706098eda25de22bcae6d93925fea65cfc0c90dbc

Canonical: https://y2.dev/cve/CVE-2026-124686

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