Release History

Progress® Telerik® Report Server 2026 Q2 (12.1.26.520)

May 20, 2026

Entity Framework Core Data Source component

NEW

• 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

NEW

• 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.

Web Designer

FIXED

• An HtmlTextBox containing two paragraph (P) elements is not rendered correctly.

Processing

FIXED

• Incorrect headers are applied when encoding a UPS MaxiCode barcode.
• The RAG optimization of AI-Powered Insights is not applied when the AI model returns a formatted boolean response.
• A race condition in the cache locking mechanism may break the exclusive locking on Linux/macOS.
• NavigateToReport actions do not work in some report directory configurations.

HTML Rendering

FIXED

• Font substitution does not take effect and the original font is used instead.

Server REST API

FIXED

• A 'Provided document Id has expired' error occurs intermittently for report image requests behind a load balancer.