CloudFormation and CDK pre-deployment validation now runs on all stack operations
AWS CloudFormation and CDK have introduced pre-deployment validation for all stack operations, including Create Stack and Update Stack. This change allows developers to catch common deployment errors in seconds, accelerating development feedback loops and reducing wasteful provision-and-rollback cycles. The validation is enabled by default and provides detailed error reporting, benefiting engineers and architects working with CI/CD pipelines and infrastructure automation.
- →Pre-deployment validation for Create and Update Stack operations
- →Optional validation disabling and global availability
- →Three new warnings during change set creation
- →Improved error reporting and troubleshooting
- →Unified validation reporting for CDK
Features (2) ›
- Pre-deployment validation for Create and Update Stack operations
CloudFormation now performs pre-deployment validation automatically on Create Stack and Update Stack operations, providing immediate feedback on common deployment errors before resource provisioning begins. This speeds up development velocity by catching issues early in the deployment cycle.
- Optional validation disabling and global availability
Pre-deployment validation is enabled by default but can be skipped using the new DisableValidation parameter or CLI flag for specific operations. This feature is available in all supported AWS Regions except China.
Enhancements (3) ›
- Three new warnings during change set creation
Three new validation checks are now available as warnings during change set creation: service quota limits, AWS Config Recorder conflicts, and ECR repository delete readiness. These warnings help prevent issues related to account limits, conflicting configurations, and incomplete deletions.
- Improved error reporting and troubleshooting
When validation detects an issue, errors are now more detailed, including the logical resource ID and property path, and accessible via the DescribeEvents API or the CloudFormation console. This allows users to pinpoint and fix problems efficiently before any resources are provisioned.
- Unified validation reporting for CDK
In AWS CDK, both 'cdk deploy' and 'cdk validate' now surface validation results in a unified report with construct-level tracing. This structured output is beneficial for AI agents and automation tools, enabling immediate self-correction.
https://aws.amazon.com/about-aws/whats-new/2026/06/aws-cloudformation/