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Amazon OpenSearch Service: security advisories, deprecations and releases
Managed OpenSearch and Elasticsearch clusters on AWS.
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Security 1
- CRITICAL AWS Security Blog · 2 Oct 2026
23 security bulletins released in August 2026
Patches address prompt-injection, RCE, credential disclosure, and SSRF across Bedrock AgentCore, OpenSearch, MQ, DocumentDB, and developer tooling.
Releases 2
- INFO AWS What's New · 12 Oct 2026
Amazon OpenSearch Service adds index-level encryption
OpenSearch Service now lets you encrypt each index at rest with its own AWS KMS customer managed key.
- INFO AWS What's New · 8 Oct 2026
Amazon OpenSearch Service adds validation advisory for domain config changes
Service now flags risky but valid config changes as Warning instead of only pass/block, allowing informed decisions without blocking deployments.
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