Released: Apr 22, 2026

Updates in 2026 Q1 (2026.1.421)

Features

• Common:
  • Updated Telerik Licensing minimal required version to 1.8.2.
  • Updated Telerik Document Processing Library (DPL) version to 2026.1.402.
• AsyncUpload (Breaking Changes):
  • CSRF validation is now enabled by default for all upload requests. Applications that do not use ASP.NET Session State must add to appSettings. Applications using WebResourceSession handler are not affected.
  • The legacy and already obsolete IFrame, Silverlight and Flash upload modules have been removed. RadAsyncUpload...

Released: Feb 25, 2026

Updates in 2026 Q1 (2026.1.225)

Features

• SmartPasteButton:
  • Added Visual Studio Designer support for RadSmartPasteButton.
  • Added RenderMode support for RadSmartPasteButton.

Fixes

• Security:
  • Addressed an insufficient entropy vulnerability.
  • External jQuery scripts are now loaded through a Telerik Handler that ensures correct load order and restricts sources to trusted CDN hosts.
• Common:
  • Fixed ReferenceError: kendo is not defined in version 2026 Q1.
• Editor:
  • Fixed issue where duplicate toolbars are rendered when ToolProviderID is...

Released: Feb 11, 2026

Updates in 2026 Q1 (2026.1.211)

Features

• Common
  • Added a new SmartPasteButton component.
  • Telerik Licensing minimal required version has been updated to 1.6.40.
  • Integrated the latest Kendo UI scripts 2026.1.208 as a foundation for delivering new capabilities such as Smart Components.
  • Breaking Changes - Encapsulated the old embedded Kendo scripts to allow coexistence with externally referenced Kendo scripts on the same page. To disable the Embedded jQuery, you must set the EnableEmbeddedjQuery="false" and ExternaljQueryUrl="link...

Released: Jan 21, 2026

Updates in 2025 Q4 (2025.4.1321)

Features

• Common:
  • Updated Telerik Licensing minimal required version to 1.6.36.
  • Multiple accessibility and keyboard navigation improvements in multiple controls (RadListBox, OrgChart, TabStrip, Date/Time Pickers, MediaPlayer).
  • Telerik Document Processing: Introduced API for automatic file format detection.
• ListBox:
  • Added WAI-ARIA support for RadListBox.
• MediaPlayer:
  • Added Loop boolean property for video repeat support.
• OrgChart:
  • Added keyboard navigation and Section 508 accessibility support...

Released: Dec 10, 2025

Updates in 2025 Q4 (2025.4.1210)

Features

• What's New:
  • Introduced keyboard support for MediaPlayer and SiteMap.
• Editor:
  • Localization support for track changes and comments tools and dialogs.
  • Find functionality now highlights the word in RadEditor HTML mode.
  • Enable accessible labels (aria-label) for RadEditor toolbar buttons.
• MediaPlayer:
  • Added keyboard support.
• SiteMap:
  • Added keyboard support with arrow keys and tab.

Fixes

• AsyncUpload:
  • InputSize in RadAsyncUpload does not work in Lightweight.
• Editor:
  • StripJavaScriptUris filter...

Released: Nov 12, 2025

Updates in 2025 Q4 (2025.4.1111)

Features

• What's New:
  • Added new SpeechToTextButton control.
  • Introduced a Telerik UI for ASP.NET AJAX AI Coding Assistant that can be used through an MCP server.
  • Introduced a Telerik Document Processing AI Coding Assistant for the PDF Processing library, which can be used through an MCP server.
• Common:
  • Telerik Document Processing: CancelationTokenSourceFactory.CreateTokenSource(TimeSpan? timeSpan) now performs proper argument checking.
• Editor:
  • Added a new StripJavaScriptUris content filter...

Released: Aug 26, 2025

Updates in 2025 Q3 (2025.3.825)

Features

• Chart (HTML):
  • Added support for patterns in SVG renderAs mode.
• OTP Input:
  • Added Visual Studio Designer support.

Fixes

• Common:
  • Fixed issue regarding hidden watermark and banner for valid trial licenses.
• Spell:
  • Fixed issue when spell-checking words containing an apostrophe.

Released: Aug 13, 2025

Updates in 2025 Q3 (2025.3.812)

Features

• Common:
  • Introduced new OTP Input component.
  • [Preview] Introduced a Telerik DPL AI Coding Assistant for the PDF Processing library that can be used through a GitHub Copilot extension or an MCP server.
  • Enhanced license popup with contextual error and trial messages.
• AsyncUpload:
  • Added MIME type mapping for .sql.
• HtmlChart:
  • Added support for series patterns in charts.
• PdfProcessing:
  • Introduced support for PDF/UA-1 compliance level.
  • Introduced Viewer Preferences to enable users to set...

Released: Jun 9, 2025

Updates in 2025 Q2 (2025.2.609)

Features

• Grid: Made accessibility improvements.

Fixes

• Common: Fixed issues where Designer stopped working for Controls.
• Grid: Fixed issue regarding missing form label of Editor controls in Batch Edit Mode.
• Grid: Fixed issue regarding missing form label of Filter controls.

Released: May 28, 2025

Updates in 2025 Q2 (2025.2.528)

Features

• Common:
  • Improved Source code build instructions.

Fixes

• Common:
  • Fixed issue where uncaught TypeError cannot read properties of null (reading 'className').
  • Fixed issue regarding Object not supporting property or method append error.