# CVE-2026-124689: Cross-Site Scripting in Kendo UI for jQuery ActionSheet Header Labels

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

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Progress Software / Kendo UI for jQuery: ≥ 2026.3.1014; < 2026.4.1110 (affected, custom); 2026.4.1110 (unaffected). Source: CNA: ProgressSoftware

## Severity and prioritization

- CVSS 3.1: 7.1 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L; source: CNA: ProgressSoftware

- CVSS 3.1: 7.1 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L; source: NVD: security@progress.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-79

## 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-actionsheet-header-xss-cve-2026-124689 (CNA: ProgressSoftware; vendor-advisory)

- https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/kb-security-kendo-actionsheet-header-xss-cve-2026-124689 (security@progress.com)

## Provenance

- CNA: ProgressSoftware: https://www.cve.org/CVERecord?id=CVE-2026-124689; retrieved 2026-11-11; source updated 2026-11-11

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-124689; retrieved 2026-11-11; source updated 2026-11-11

Revision: c74c5ce31936d4bc0f88d61575850c348874901bb5ba16252024364bb98c36bd

Canonical: https://y2.dev/cve/CVE-2026-124689

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