Release History

Telerik UI for ASP.NET MVC 2026.2.520 (2026 Q2)

May 20, 2026

Common

NEW

• Meridian Theme
• Translate kendo messages in all supported languages

Breaking Changes

• Loader Container overlay class changed from k-overlay-light to k-overlay
• Caret icons replaced with chevron icons
• Light and Dark Theme Colors Removed Globally

Dependencies

• Telerik Document Processing Library (DPL) version (2026.2.519)
• Meridian Theme Package (v14.1.0)
• Fluent Theme Package (v14.1.0)
• Classic Theme Package (v14.1.0)
• Bootstrap Theme Package (v14.1.0)
• Default Theme Package (v14.1.0)
• Material Theme Package (v14.1.0)

Avatar

FIXED

• Avatar image url can be escaped

Button

Breaking Changes

• Button Size option type changed to accept xsmall and ComponentSize changed to ButtonSize

Chat

NEW

• Chat Endless scrolling feature

FIXED

• Chat filesTemplate regression (#8449)

ChipList

FIXED

• Unable to prevent ChipList select event

ComboBox

FIXED

• The setOptions method of the ComboBox does not reset the height configuration.

ContextMenu

FIXED

• Missing class k-menu-group on ContextMenu ul element (#8454)
• Unexpected aria-expanded false attribute set to Menu items with no child items

Dialog

Breaking Changes

• Dialog ThemeColor Option Removed

DropDownButton

FIXED

• The DropDownButton API does not expose all configuration options for Popup customization (#6970)

DropDownList

FIXED

• JS error thrown by adaptive DropDownList on resizing browser from mobile to desktop width (#8460)

Editor

FIXED

• Editor inside iframe resolves wrong document object
• Export tool message is displayed as a tool title
• Editor formatting creates redundant span element
• Editor closes Source element tags (#4909)

FileManager

FIXED

• Filemanager filters folders after clearing the search (#5964)

Filter

FIXED

• Using keyboard navigation does not focus elements in main Filter toolbar (#8459)

Form

NEW

• EditorTemplateViewFor in FormItemBuilder

Gantt

FIXED

• Gantt events ending on 31st of December are not visible in Month and Year view in Firefox (#8234)

Breaking Changes

• Gantt view selector changed from ButtonGroup to SegmentedControl

Grid

NEW

• Sticky Groups
• Row Pinning
• Grid CaseSensitiveFiltering is not working with EF database

FIXED

• JS error is thrown when initializing an initially hidden stacked-layout Grid (#25411)
• Wrong position of Grid drop clue indicator k-reorder-cue in RTL
• Filter expressions are inverted when reopening the column filter menu (#8305)

Menu

FIXED

• Unexpected aria-expanded false attribute set to Menu items with no child items
• Scrollable menu opening wrong menu on mobile (#8178)

PDFViewer

FIXED

• PdfViewer table of content (#8438)

Breaking Changes

• PDFViewer Loader overlay class changed from k-overlay-light to k-overlay

PivotGrid

FIXED

• Ampersand in column values prevents column from expanding

PropertyGrid

FIXED

• PropertyGrid throws js error because appearance properties are serialized with null values

Scheduler

FIXED

• Scrolling Scheduler when dragging events not possible in RTL Scheduler (#8465)

Breaking Changes

• Scheduler view selector changed from ButtonGroup to SegmentedControl

Signature

FIXED

• When using the Signature in a Wizard the the drawing line is being offset. (#7143)
• Kendo Signature span between signature line and pen/mouse cursor (#7108)

Spreadsheet

FIXED

• Unable to change Spreadsheet cell format via Format dialog (#25415)
• The items in the DropDownButton for the Spreadsheet's sheet tabs are not translateable (#8372)
• Spreadsheet filter icons do not respect rowHeigh (#8258)

TaskBoard

FIXED

• Taskboard tasks cannot be reordered in the same column (#8407)

TimeDurationPicker

FIXED

• TimeDurationPicker label issues

Tooltip

FIXED

• ToolTip is not recalculating its dimensions when the target text is changed (#8434)

Window

FIXED

• Incomplete typescript definitions for the Window title (#8287)

Breaking Changes

• Window ThemeColor Option Removed