AWS elasticloadbalancing documentation change

Service: elasticloadbalancing · 2025-08-16 · Documentation medium

File: elasticloadbalancing/latest/application/load-balancer-update-security-groups.md

Summary

Added CloudFormation example and restructured security group update instructions with clearer section headers

Security assessment

The changes improve documentation about managing security groups (a security feature), but do not address any specific vulnerability. The added CloudFormation example helps implement security group configurations, which is security-related documentation.

Diff

diff --git a/elasticloadbalancing/latest/application/load-balancer-update-security-groups.md b/elasticloadbalancing/latest/application/load-balancer-update-security-groups.md
index 3111f1db0..213529c2f 100644
--- a//elasticloadbalancing/latest/application/load-balancer-update-security-groups.md
+++ b//elasticloadbalancing/latest/application/load-balancer-update-security-groups.md
@@ -58 +58,4 @@ You can update the security groups associated with your load balancer at any tim
-###### To update security groups using the console
+Console
+    
+
+###### To update security groups
@@ -75 +78,4 @@ You can update the security groups associated with your load balancer at any tim
-###### To update security groups using the AWS CLI
+AWS CLI
+    
+
+###### To update security groups
@@ -78,0 +85,27 @@ Use the [set-security-groups](https://docs.aws.amazon.com/cli/latest/reference/e
+    
+    aws elbv2 set-security-groups \
+        --load-balancer-arn load-balancer-arn \
+        --security-groups sg-01dd3383691d02f42 sg-00f4e409629f1a42d
+
+CloudFormation
+    
+
+###### To update security groups
+
+Update the [AWS::ElasticLoadBalancingV2::LoadBalancer](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/aws-resource-elasticloadbalancingv2-loadbalancer.html) resource.
+    
+    
+    Resources:
+      myLoadBalancer:
+        Type: 'AWS::ElasticLoadBalancingV2::LoadBalancer'
+        Properties:
+          Name: my-alb
+          Type: application
+          Scheme: internal
+          Subnets: 
+            - !Ref subnet-AZ1
+            - !Ref subnet-AZ2
+          SecurityGroups: 
+            - !Ref mySecurityGroup
+            - !Ref myNewSecurityGroup
+