Telerik Report Server 2026 Q3 (12.2.26.812)2026年8月12日
機能
Report Server for .NET now includes an MCP Server for AI-native administration:
Telerik Report Server for .NET now includes a built-in MCP Server that exposes report management and a wide range of other administrative operations, such as users, permissions, data connections, and scheduled tasks, as MCP tools authenticated via Personal Access Tokens.
Report Server for .NET now offers a new version of its REST API:
Report Server for .NET now offers a new version of its REST API, with more consistent responses and error handling across all endpoints.
Reporting NuGet packages are now published to the public NuGet Gallery:
Telerik Reporting NuGet packages are now available on the public NuGet Gallery (nuget.org), in addition to the Telerik private feed. This makes it easier to reference and restore Reporting packages in projects and CI pipelines that use the public gallery by default.
JSON Report Definition Format for Reports:
Telerik Reporting now supports a new JSON-based report definition file format alongside the existing XML formats. It's easy to read and edit by hand or with AI coding assistants, produces clean version-control diffs, and can be validated in CI pipelines using a published JSON Schema.
Reporting now supports Aztec barcode encoding and rendering:
Telerik Reporting now supports Aztec barcode encoding and rendering, adding another 2D barcode symbology you can use in your reports.
What's Improved:
Excel document generation is now faster, thanks to optimized internal data structures.
Report Server personal access tokens now support a Report Server API scope, in addition to the existing Report Viewer scope.
Collection Editors in desktop report designers now provide copy-paste functionality for their contents.
The Standalone Report Designer now uses Unicode-aware (UAX#29) word selection when double-clicking in text fields.
The Web Report Designer now allows copying the sample snippets shown for functions.
The HTML5 Report Viewer's Report Preview Insights prompt now supports voice input via a microphone button.
Report Server for .NET now offers an HttpClient library distributed as a NuGet package.
The Standalone Report Designer now supports rearranging opened report tabs by dragging them.
The Logarithmic scale of the Graph item now provides MajorStep and LabelStep properties for improved customization and readability.
修正
XML Configuration:
An assembly with a partial 'version' value is rejected as untrusted in the 'assemblyReferences' element.
Crystal Reports Converter:
Parameter Fields are not converted to Report Parameters.
Suppression formulas are not converted to a visibility expression.
Desktop Designer:
The Import Code File Wizard shows a warning when using a non-English locale despite build succeeding.
Double-clicking a word in the expression editor does not select the correct word boundaries.
Web Designer:
A 404 console error occurs for a missing jQuery.UI icon.
Font icons CSS is incompatible with the latest @progress/kendo-font-icons version.
The WebServiceDataSource authentication selector fails to render when using non-English string resources.
Processing:
A serialization exception is thrown when setting the NoDataStyle BackgroundImage of data items and PictureBox.
HtmlTextBox does not preserve non-breaking space behavior between sibling inline elements.
Rendering:
Graph labels and legends are not aligned when using the Skia rendering engine.
PDF Rendering:
PDF export can incorrectly merge or duplicate distinct images that share pixel dimensions and similar content.
Word Rendering:
A bullet list item that spans two pages gets a duplicate bullet.
A numbered list that spans two pages restarts numbering at (1).
Server Manager:
Favoriting a report fails for users with the "Report Reader" role.
Telerik Report Server 2026 Q2 (12.1.26.707)2026年7月8日
機能
What's Improved:
Notification pop-ups in the Web Report Designer can now be closed manually.
修正
Configuration:
Fixed issue where a vulnerable SQLite version is referenced by the .NET implementation.
Desktop Designer:
Fixed issue where a NullReferenceException is thrown when previewing a report book with externally styled child reports.
PDF Rendering:
Fixed issue where alternative text of accessible items is read multiple times by Acrobat Reader's 'Read out Loud' functionality.
Report Server:
Fixed issue where Active Directory users are migrated with an incorrect 'Federation' account type.
Preview:
Fixed issue where print dialog does not open when the browser is set to always download PDFs.
Telerik Report Server 2026 Q2 (12.1.26.615)2026年6月16日
修正
Report Server:
Fixed issue where the "Allow Reading Nested Reports" permission cannot be applied to the Guest user.
Telerik Report Server 2026 Q2 (12.1.26.520)2026年5月20日
機能
Entity Framework Core Data Source component:
Developers can now bind reports directly to Entity Framework Core DbContext models using a dedicated data source component. The new EF Core Data Source is available in the Standalone Report Designer for .NET and the Web Report Designer, with support for design-time data preview, Shared Data Sources, and parameterized queries.
What's Improved:
The Windows distribution of Report Server for .NET is now bundled with Standalone Report Designer for .NET.
The Reporting engine now loads available rendering extensions on demand for faster application startup.
The Reporting engine now supports Firebird .NET Client Data Provider out-of-the-box without manual configuration.
The HTML5 Report Viewer now uses CSP-compliant templates instead of inline templates.
修正
Web Designer:
Fixed issue where an HtmlTextBox containing two paragraph (P) elements is not rendered correctly.
Processing:
Fixed issue where incorrect headers are applied when encoding a UPS MaxiCode barcode.
Fixed issue where the RAG optimization of AI-Powered Insights is not applied when the AI model returns a formatted boolean response.
Fixed issue where a race condition in the cache locking mechanism may break the exclusive locking on Linux/macOS.
Fixed issue where NavigateToReport actions do not work in some report directory configurations.
HTML Rendering:
Fixed issue where font substitution does not take effect and the original font is used instead.
Server REST API:
Fixed issue where a 'Provided document Id has expired' error occurs intermittently for report image requests behind a load balancer.
Telerik Report Server 2026 Q1 (12.0.26.424)2026年4月24日
機能
MaxiCode (ISO/IEC 16023:2000) barcode encoding and rendering support:
MaxiCode (ISO/IEC 16023:2000) is now supported as a 2D barcode type, enabling encoding and rendering of UPS-compatible package labels and other logistics scenarios. The implementation supports all standard MaxiCode modes and is available across all rendering formats.
What's Improved:
The Reporting engine configuration now includes a "verbose" tracing option for investigation and troubleshooting scenarios.
修正
Rendering:
Ordered list content in HtmlTextBox may be cut mid‑line across page boundaries.
HTML Rendering:
HtmlTextBox does not apply background colors defined in its content.
Shapes and empty text boxes are rendered without ARIA roles when accessibility is enabled.
PDF Rendering:
Nested tables inside subreports cause accessibility validation errors.
Graph alternative text is read repeatedly by screen readers in accessible files.
Page Footer content may not be read by screen readers when a report includes a watermark.
Report item alternative text is read multiple times or out of order by screen readers.
The reading order of tables is incorrect in accessible reports.
Date and numeric values are not exposed with the correct accessibility semantics.
Preview:
Parameter area ARIA label includes invisible parameters when accessibility is enabled.
Telerik Report Server 2026 Q1 (12.0.26.402)2026年4月2日
機能
Explicit control over Table of Contents levels for report items
Report authors can now explicitly specify the level at which sections, groups, and items appear in the Table of Contents, instead of relying solely on the report hierarchy. This provides greater control over TOC structure and enables consistent, meaningful outlines across reports and report books.
Secure connectivity between Standalone Report Designer for .NET and Report Server for .NET
The Standalone Report Designer for .NET can now securely connect to Report Server for .NET using token‑based authentication. This enables report authors to open, edit, and publish reports directly to the server.
User permissions now allow more granular control over report access
Enhanced the report access security by introducing a permission rule, “Allow Reading Nested Reports,” which controls whether users can read reports embedded as sub-reports or included in a Report Book.
What's Improved
ObjectDataSource now supports async methods returning Task and ValueTask.
The ReportProcessor class now exposes a method to list available rendering extensions.
What's Changed
The permissions for reading reports are now applied to reports, embedded as sub-reports or included in a Report Book.
修正
Web Designer
GetDesignerResource endpoint fails for requests with different letter casing.
Rendering
"Missing license" message is not displayed correctly in exported CSV and Excel files.
PDF Rendering
SVG polylines with dashed or thick strokes are rendered incorrectly in PDF export using GDI graphics engine.
Report Server .NET
Disabling the last enabled user is allowed.
The SQL Data Source wizard fails to execute queries with parameters.
Preview
Localization does not work for the Angular and React Report Viewer wrappers.
Telerik Report Server 2026 Q1 (12.0.26.304)2026年3月5日
機能
Improved: Now navigates back to the Security tab when the "BACK TO CONFIGURATION PAGE" button in "Configure Encryption" view is clicked.
修正
Processing
Fixed Unix epoch DateTime format is not resolved correctly.
Fixed String parameters containing hyphenated numeric values are resolved as DateTime.
Fixed DateTime report parameter using only date part is calculated as one day earlier when the service uses a positive timezone offset.
Rendering
Fixed stretched ellipse shapes do not render correctly when using the Skia graphics engine.
Excel Rendering
Fixed the CheckBox item's check mark images are not rendered correctly in Excel when using the Skia graphics engine.
Report Server
Fixed data grids do not maintain their scroll position after editing an entry.
Fixed TELERIK_LICENSE_PATH environment variable is not respected when validating the product license key.
Report Server .NET
Fixed scheduled tasks fail when rendering reports that use WebServiceDataSource/JsonDataSource.
Preview
Fixed error messages for parameter editors are rendered in incorrect color.
Telerik Report Server 2026 Q1 (12.0.26.211)メジャーバージョン2026年2月11日
機能
HtmlTextBox now supports inline images through the "img" tag:
The HtmlTextBox report item now allows embedding images directly inside HTML-formatted content using the "img" tag, including support for common attributes and basic styling. This enables seamless inline image rendering across all supported designers and output formats.
Paged report layout now supports repeatable table group headers/footers:
Table, Crosstab, and List items now include a PrintOnEveryPage property that allows static group headers/footers to repeat on every page the group spans. This improves readability when large groups extend across multiple pages.
What's Improved:
PDF417 barcodes now support a configurable module width‑to‑height ratio.
Client Access License details are now displayed in the user interface.
What's Changed:
WebService and Json data sources in .NET now comply with RFC 8259 and RFC 9535 (for JSON path), which may lead to differences in behavior.
修正
Web Designer:
Fixed issue where monochromatic palette lightness controls do not adjust values in 0.1 increments.
Processing:
Fixed issue where Code 128 barcodes always use Code 128A even when control characters request Code 128B.
Rendering:
Fixed issue where setting LabelAngle causes the last graph label to disappear when using Skia graphics engine.
PDF Rendering:
Fixed issue where accessibility readers announce ordered list text before the numbering in HTMLTextBox.
Report Server:
Fixed issue where the "Activity" and "Created By" string resources used in the Scheduled Tasks and Data Alerts pages are missing from the localization files.
Telerik Report Server 2025 Q4 (11.3.26.121)2026年1月21日
機能
What's Improved:
Enhanced Color Palette Editor consistency across Color, Gradient, and Mono modes.
修正
Object Data Source:
Fixed issue where Data Explorer fails to load schema for data sources with multiple parameters.
Web Designer:
Fixed issue where Chart color changes are not reflected at design time.
Fixed issue where "Snap to grid lines" option is enabled when the feature is not supported.
Report Server:
Fixed System.IO.FileNotFoundException: Could not load file or assembly 'System.Text.Json' in logs.
Report Server .NET:
Fixed issue where server configuration on Linux fails.
Fixed issue where storage cannot be changed after upgrading using separate installer.
Preview:
Fixed issue where report actions are not keyboard-accessible when 'enableAccessibility' is 'true'.