App Engine flex Node.js to use Cloud SQL Auth Proxy v2 for Cloud SQL connections
Google Cloud's App Engine flexible environment for Node.js will transition to using Cloud SQL Auth Proxy v2 as its built-in sidecar container for Cloud SQL connections. This update, effective August 2026, aims to provide modern security patches and support for MySQL 8.4 and later versions. Developers can adopt the latest proxy immediately by restarting their VMs or deploying a new application version. This change affects Node.js applications connecting to Cloud SQL via App Engine flexible environment.
Features (1) ›
- App Engine flexible environment Node.js
Starting from August 2026, to provide modern security patches and support for MySQL 8.4 and later, the App Engine flexible environment uses Cloud SQL Auth Proxy v2 as the built-in sidecar container for connections to Cloud SQL. To use the latest Cloud SQL Auth Proxy container immediately, restart your VMs or deploy a new version of your application.
https://docs.cloud.google.com/release-notes#August_20_2026
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