AWS Security ChangesHomeSearch

AWS eks: EKS Auto Mode: NLB tag annotation not applied to shared backend SG

Service: eks · 2026-10-17 · Documentation low

File: eks/latest/userguide/auto-configure-nlb.md

Summary

Clarifies in the annotation table and a new note that the `aws-load-balancer-additional-resource-tags` annotation is not applied to the shared backend security group, which must be tagged separately.

Security assessment

Documentation-only clarification about tag propagation to a shared backend security group; no security control, permission, or exposure change is described and no vulnerability is referenced.

Evidence

+  * EKS Auto Mode doesn’t apply tags from the `aws-load-balancer-additional-resource-tags` annotation to the backend security group that all load balancers in the cluster share. To tag this security group, add the tags separately.

Diff

diff --git a/eks/latest/userguide/auto-configure-nlb.md b/eks/latest/userguide/auto-configure-nlb.md
index 1feb603..31765a4 100644
--- a//eks/latest/userguide/auto-configure-nlb.md
+++ b//eks/latest/userguide/auto-configure-nlb.md
@@ -75 +75 @@ Field | Description | Example
-`aws-load-balancer-additional-resource-tags` |  Additional AWS tags to apply to the load balancer and related resources. |  `Environment=prod,Team=platform`  
+`aws-load-balancer-additional-resource-tags` |  Additional AWS tags to apply to the load balancer and related resources. Not applied to the shared backend security group. |  `Environment=prod,Team=platform`  
@@ -82,0 +83,2 @@ Field | Description | Example
+  * EKS Auto Mode doesn’t apply tags from the `aws-load-balancer-additional-resource-tags` annotation to the backend security group that all load balancers in the cluster share. To tag this security group, add the tags separately.
+