Release History

Telerik UI for ASP.NET Core 2026.1.325

March 25, 2026

Common

NEW

• New SegmentedControl Component
• .NET 11 Preview 2 Compatibility

FIXED

• Invalid License Key Message When Using Form TagHelper with an editor definition(#8448)

Dependencies

• Telerik Document Processing Library (DPL) version(2026.1.210)
• Fluent Theme Package(v13.1.1)
• Classic Theme Package(v13.1.1)
• Bootstrap Theme Package(v13.1.1)
• Default Theme Package(v13.1.1)
• Material Theme Package(v13.1.1)

Chart

FIXED

• Column Chart is not rendered correctly since version 2025.3.812(#8435)

Chat

FIXED

• Message Actions are not per Chat instance
• Chat suggestionsTemplate function doesn't work in version 2026 Q1(#8437)

Diagram

NEW

• Add missing properties in Diagram - widget and wrappers

DockManager

FIXED

• CSP errors thrown on dragging DockManager panes

DropDownTree

FIXED

• CSP errors thrown when using TreeView or DropDownTree with checkboxes
• The "autoWidth" option does not adjust the width of the popup when expanding an item(#8308)

Editor

FIXED

• Nested AIPrompt HTML Helper is unnecessarily added in ViewContext
• Editor with enabled immutables incorrectly enables table tools when table is not selected(#7812)
• Editor doesn't respect multiple separators on the tools configuration(#7784)

Filter

FIXED

• Filter - Invalid isnull queries for dates(#7401)

Form

FIXED

• Form component throws JS error when CSP is enabled

Grid

NEW

• Grid: CSV export

FIXED

• Invalid aria-selected attribute on rows in locked column in the Grid(#8261)

InlineAIPrompt

FIXED

• Nested AIPrompt HTML Helper is unnecessarily added in ViewContext

ListBox

FIXED

• ListBox draggable.enabled = false throws error when trying to remove the placeholder(#8169)

PDFViewer

FIXED

• High severity vulnerabilities in `tar` dependency via `@progress/kendo-pdfviewer-common`(#8445)

Scheduler

FIXED

• RTL Scheduler events cannot be resized in Month/Timeline views(#8450)

Signature

FIXED

• Signature clear button does not trigger the change event(#8154)

Spreadsheet

FIXED

• Some listed formula not working as expected(#8408)

TreeList

FIXED

• Columns are not resized correctly when there is a frozen column in TreeList(#7740)

TreeView

FIXED

• CSP errors with TreeView on 2026.1.212(#8443)
• CSP errors thrown when using TreeView or DropDownTree with checkboxes