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Microsoft issues emergency fix for critical ASP.NET Core flaw

Microsoft has released an out-of-band fix for CVE-2026-40372, a critical ASP.NET Core vulnerability with a CVSS score of 9.1 that could grant SYSTEM privileges. The flaw stems from improper ...
CSO Online

Microsoft issues out-of-band patch for critical security flaw in update to ASP.NET Core

Patching is not enough: applications embedding the insecure library will need to be rebuilt, and affected tokens and cookies ...

Microsoft issues emergency update for macOS and Linux ASP.NET threat

Microsoft released an emergency patch for its ASP.NET Core to fix a high-severity vulnerability that allows unauthenticated ...
Visual Studio Magazine

BFF and SPAs: Best Friends Forever

Christian Wenz explains why the Backends for Frontends (BFF) pattern is emerging as a more secure authentication model for single-page applications.
GitHub

ClosedXML is a .NET library for reading, manipulating and writing Excel 2007+ (.xlsx, .xlsm) files. It aims to provide an intuitive and user-friendly interface to dealing with ...

The public API is still not stable and it is a very good idea to read release notes and migration guide before each update. Performance matters mostly for large files. For small files, few ms here or ...