Microsoft issues emergency update for macOS and Linux ASP.NET threat
Microsoft has released an emergency, out-of-band security patch for a critical vulnerability in ASP.NET Core affecting macOS and Linux systems. The flaw could potentially allow for remote code execution, and developers are strongly urged to update their applications and servers immediately.
MY TAKE
This is a must-patch vulnerability for any team running .NET on non-Windows environments. The cross-platform nature of modern .NET means we have to remain vigilant about security issues that arise outside the traditional Windows ecosystem.
Microsoft issues emergency update for macOS and Linux ASP.NET threat" from Ars Technica (https://arstechnica.com/security/2026/04/microsoft-issues-emergency-update-for-macos-and-linux-asp-net-threat/) [Wed, 22 Apr 2026 19:32:56 +0000]