Microsoft has released the .NET 10.0.7 update, which includes a critical security fix for CVE-2026-40372 that addresses a flaw in DataProtection HMAC validation, allowing attackers to forge authentication tokens. Developers can install the update via official installers, Docker images, or package managers, but must also rotate the DataProtection key ring to invalidate any compromised tokens from the vulnerable period. The guide highlights the importance of verifying the installation to prevent build failures, especially when using Docker or Visual Studio. Teams are advised to monitor application logs post-upgrade for any lingering issues and ensure compatibility with the updated project files to avoid silent failures
Microsoft .NET 10.0.7 released
Microsoft has released the .NET 10.0.7 update with a critical security fix for CVE-2026-40372, which resolves a DataProtection HMAC validation flaw that could allow attackers to forge authentication tokens. Developers can install the new SDK or runtime through official installers, Docker images, or package managers while ensuring their IDEs like Visual Studio 18.4 stay compatible. After upgrading, rotating the DataProtection key ring remains mandatory to invalidate any compromised tokens generated during the vulnerable window. Skipping this patch leaves web applications exposed to authentication bypasses, making immediate deployment essential for maintaining secure session handling.
