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AWS AWSCloudFormation documentation change

Service: AWSCloudFormation · 2026-02-28 · Documentation medium

File: AWSCloudFormation/latest/TemplateReference/aws-properties-ecs-capacityprovider-instancelaunchtemplate.md

Summary

Added CapacityReservations support and FIPS 140-2 cryptographic module configuration for EC2 instances

Security assessment

The addition of FIPS 140-2 documentation explicitly describes enhanced cryptographic compliance, but there is no evidence of addressing a specific security vulnerability. This adds security feature documentation.

Diff

diff --git a/AWSCloudFormation/latest/TemplateReference/aws-properties-ecs-capacityprovider-instancelaunchtemplate.md b/AWSCloudFormation/latest/TemplateReference/aws-properties-ecs-capacityprovider-instancelaunchtemplate.md
index b6edfe2cc..05fd05502 100644
--- a//AWSCloudFormation/latest/TemplateReference/aws-properties-ecs-capacityprovider-instancelaunchtemplate.md
+++ b//AWSCloudFormation/latest/TemplateReference/aws-properties-ecs-capacityprovider-instancelaunchtemplate.md
@@ -19,0 +20 @@ To declare this entity in your CloudFormation template, use the following syntax
+      "CapacityReservations" : [CapacityReservationRequest](./aws-properties-ecs-capacityprovider-capacityreservationrequest.html),
@@ -32,0 +34,2 @@ To declare this entity in your CloudFormation template, use the following syntax
+      CapacityReservations: 
+        [CapacityReservationRequest](./aws-properties-ecs-capacityprovider-capacityreservationrequest.html)
@@ -49 +52 @@ To declare this entity in your CloudFormation template, use the following syntax
-The capacity option type. This determines whether Amazon ECS launches On-Demand or Spot Instances for your managed instance capacity provider.
+The capacity option type. This determines whether Amazon ECS launches On-Demand, Spot or Capacity Reservation Instances for your managed instance capacity provider.
@@ -56,0 +60,2 @@ Valid values are:
+  * `RESERVED` \- Launches Instances using Amazon EC2 Capacity Reservations. Capacity Reservations allow you to reserve compute capacity for Amazon EC2 instances in a specific Availability Zone.
+
@@ -68 +73 @@ _Required_ : No
- _Allowed values_ : `ON_DEMAND | SPOT`
+ _Allowed values_ : `ON_DEMAND | SPOT | RESERVED`
@@ -71,0 +77,20 @@ _Required_ : No
+`CapacityReservations`
+    
+
+Capacity reservation specifications. You can specify:
+
+  * Capacity reservation preference
+
+  * Reservation resource group to be used for targeted capacity reservations
+
+
+
+
+Amazon ECS will launch instances according to the specified criteria.
+
+_Required_ : No
+
+ _Type_ : [CapacityReservationRequest](./aws-properties-ecs-capacityprovider-capacityreservationrequest.html)
+
+ _Update requires_ : [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)
+
@@ -88 +113,3 @@ _Required_ : Yes
-Property description not available.
+Determines whether to enable FIPS 140-2 validated cryptographic modules on EC2 instances launched by the capacity provider. If `true`, instances use FIPS-compliant cryptographic algorithms and modules for enhanced security compliance. If `false`, instances use standard cryptographic implementations.
+
+If not specified, instances are launched with FIPS enabled in AWS GovCloud (US) regions and FIPS disabled in other regions.