AWS Security ChangesHomeSearch

AWS opensearch-service documentation change

Service: opensearch-service · 2026-04-04 · Documentation low

File: opensearch-service/latest/developerguide/cross-cluster-search.md

Summary

Added prerequisite note about VPC connectivity and security group configuration for cross-cluster search when domains are in a VPC.

Security assessment

The change adds documentation about network security requirements (VPC Peering/Transit Gateway and security groups) for cross-cluster search, which is a security best practice for isolating and controlling traffic between domains. However, there is no indication of a specific security issue being fixed.

Diff

diff --git a/opensearch-service/latest/developerguide/cross-cluster-search.md b/opensearch-service/latest/developerguide/cross-cluster-search.md
index 7756a643c..963367a9f 100644
--- a//opensearch-service/latest/developerguide/cross-cluster-search.md
+++ b//opensearch-service/latest/developerguide/cross-cluster-search.md
@@ -79,0 +80,2 @@ Before you set up cross-cluster search, make sure that your domains meet the fol
+  * If either domain is in a VPC, the domains must be connected via VPC Peering or Transit Gateway, and the security groups must allow traffic between them.
+