Vulnerability · Published Oct 15, 2026 · Assigned by ProgressSoftware

CVE-2026-106158Cross-Site Scripting via Scheduler Resource Colors in Kendo UI for jQuery

Medium 4.7

In plain English

A medium-severity security flaw in Kendo UI for jQuery from Progress Software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).

Severity (CVSS 3.1)4.7Medium

Exploit odds (30 days)0.2%top 93.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

In Progress® Kendo® UI for jQuery, in v2026.3.811 and earlier, the Scheduler Day, Timeline, Month, and Agenda views insert resource color values into quoted event wrapper attributes without proper encoding. An attacker who can control a resource color can inject additional HTML attributes, including event handlers, and execute JavaScript in a user's browser when the affected event is interacted with. Successful exploitation can compromise the confidentiality and integrity of data accessible to the affected application. The earliest affected version has not been confirmed. This issue is fixed in version 2026.3.1015.

Affected products (as reported)

Vendor	Product	Versions
Progress Software	Kendo UI for jQuery	2014.3.1119 – before 2026.3.1015

Weakness: CWE-80 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

References

https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/kb-security-scheduler-resource-color-xss-cve-2026-106158 vendor-advisory