# CloudformationStack
<a name="API_CloudformationStack"></a>

Contains information about the CloudFormation stack involved in a GuardDuty finding, including unique identifiers of the Amazon EC2 instances.

## Contents
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 ** ec2InstanceUids **   <a name="guardduty-Type-CloudformationStack-ec2InstanceUids"></a>
A list of unique identifiers for the compromised Amazon EC2 instances that were created as part of the same CloudFormation stack.  
Type: Array of strings  
Array Members: Minimum number of 0 items. Maximum number of 25 items.  
Length Constraints: Minimum length of 0. Maximum length of 256.  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/guardduty-2017-11-28/CloudformationStack) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/guardduty-2017-11-28/CloudformationStack) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/guardduty-2017-11-28/CloudformationStack) 

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for Amazon GuardDuty. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query guardduty` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).