Medium · CVSS 5.4CVE-2026-106153

Cross-site Scripting (XSS) in Kendo UI for jQuery Calendar and MultiViewCalendarCVE-2026-106153

Answer in brief

CVE-2026-106153 records a Medium severity (CVSS 5.4) vulnerability in Cross-site Scripting (XSS) in Kendo UI for jQuery Calendar and MultiViewCalendar. The current sources do not mark it as known exploited. The current feed maps Progress Software/Kendo UI for jQuery (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 15, 2026Updated Oct 15, 2026Source checked Oct 15, 2026First seen by HOL Oct 15, 2026Material review Oct 15, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.4
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 5.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Progress Software/Kendo UI for jQuery (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Progress Software/Kendo UI for jQuerygeneric	>=2011.3.1007 <2026.3.1015	2026.3.1015

Recommended response

Check inventory. Check lockfiles and deployed manifests for Progress Software/Kendo UI for jQuery.
Review the reported fix. Update Progress Software/Kendo UI for jQuery to 2026.3.1015 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 15, 2026

Sources and claim methodology

Source referencetelerik.com

Upstream source description

In Progress® Kendo® UI for jQuery prior to version 2026.3.1015, the Calendar and MultiViewCalendar month content templates render data.url and data.title without proper URL sanitization and HTML attribute encoding. An attacker with low privileges who can control the URL option or culture-derived title values can supply a JavaScript URL or inject event-handler attributes. When a user interacts with an affected calendar, JavaScript can execute in the user's browser context and compromise the confidentiality and integrity of accessible data.

Quoted source text, attributed separately from HOL analysis.