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AWS opensearch-service documentation change

Service: opensearch-service · 2026-01-25 · Documentation low

File: opensearch-service/latest/developerguide/application-release-history.md

Summary

Added release note for CMK encryption support and metadata size increase

Security assessment

Documents new security feature (CMK encryption) for compliance. No evidence of security vulnerability being addressed.

Diff

diff --git a/opensearch-service/latest/developerguide/application-release-history.md b/opensearch-service/latest/developerguide/application-release-history.md
index 907be92da..5c7caa83e 100644
--- a//opensearch-service/latest/developerguide/application-release-history.md
+++ b//opensearch-service/latest/developerguide/application-release-history.md
@@ -10,0 +11 @@ Change | Release date | Description
+New feature |  2025-12-29 | OpenSearch UI now supports customer managed keys (CMK) for encrypting application metadata. This feature helps you meet regulatory and compliance requirements by giving you full control over encryption keys. This launch also increases the metadata size limit for saved objects in OpenSearch UI, enabling you to create and store complex queries, extensive visualizations, and large-scale workspaces. For more information, see [Encrypting OpenSearch UI application metadata with customer managed keys](./application-encryption-cmk.html).