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AWS AWSCloudFormation documentation change

Service: AWSCloudFormation · 2026-05-25 · Documentation low

File: AWSCloudFormation/latest/TemplateReference/aws-properties-arcregionswitch-plan-eventsourcemapping.md

Summary

Updated property descriptions for EventSourceMapping to clarify its purpose as AWS Lambda event source mapping configuration, including details about ARN, cross-account role, and external ID

Security assessment

The change adds documentation about security features (cross-account roles and external IDs) but doesn't indicate any specific security vulnerability being fixed. The external ID mention improves security documentation by highlighting secret key management.

Diff

diff --git a/AWSCloudFormation/latest/TemplateReference/aws-properties-arcregionswitch-plan-eventsourcemapping.md b/AWSCloudFormation/latest/TemplateReference/aws-properties-arcregionswitch-plan-eventsourcemapping.md
index efa829f1a..f282309fe 100644
--- a//AWSCloudFormation/latest/TemplateReference/aws-properties-arcregionswitch-plan-eventsourcemapping.md
+++ b//AWSCloudFormation/latest/TemplateReference/aws-properties-arcregionswitch-plan-eventsourcemapping.md
@@ -11 +11 @@ This is the new _CloudFormation Template Reference Guide_. Please update your bo
-The `EventSourceMapping` property type specifies Property description not available. for an [AWS::ARCRegionSwitch::Plan](./aws-resource-arcregionswitch-plan.html).
+The AWS Lambda event source mapping configuration, containing the resource ARN and optional cross-account configuration.
@@ -40 +40 @@ To declare this entity in your CloudFormation template, use the following syntax
-Property description not available.
+The Amazon Resource Name (ARN) of the Lambda event source mapping.
@@ -53 +53 @@ _Update requires_ : [No interruption](https://docs.aws.amazon.com/AWSCloudFormat
-Property description not available.
+The cross account role for the configuration.
@@ -66 +66 @@ _Update requires_ : [No interruption](https://docs.aws.amazon.com/AWSCloudFormat
-Property description not available.
+The external ID (secret key) for the configuration.