App Engine flexible environment .NET to enforce TLS 1.2+ for improved security
Google App Engine flexible environment for .NET applications will begin enforcing TLS version 1.2 and later starting August 2026. This change aims to significantly improve security by eventually blocking traffic using older, insecure TLS versions like 1.1 and earlier from September 2026. Developers can opt out of this enforcement until the end of August 2026, but are encouraged to upgrade their applications to ensure compliance and security.
Features (1) ›
- App Engine flexible environment .NET
To improve security, starting in August 2026, App Engine opts your application into TLS version 1.2 and later. You can opt out until the end of August 2026. Starting in September 2026, App Engine might permanently block insecure traffic with TLS version 1.1 and earlier. For more information, see Secure minimum TLS .
https://docs.cloud.google.com/release-notes#August_14_2026
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