CVE-2026-83497 - OpenSearch SQL Plugin - Unrestricted Java Deserialization in Cursor Pagination

Bulletin ID: 2026-092-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/31/2026 11:30 AM PDT Description: OpenSearch is an open-source search and analytics engine. We identified CVE-2026-83497 where a remote authenticated user with basic read/search permissions can run arbitrary code on the server by providing a crafted cursor parameter to the plugins/sql endpoint. Affected Products & Versions: OpenSearch SQL Plugin (open-source, self-managed): - Affected: v2.8 to v3.6 - Fixed: versions 3.7 and 2.19.6 Amazon OpenSearch Service (AWS Managed): - Affected: v2.9 to v3.5 - Fixed: v2.9 to v3.5 (via service software update) Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.