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CVE-2026-19311- Missing Authorization in OpenSearch Alerting PluginCVE-2026-19311
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Bulletin ID: 2026-078-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/12/2026 11:30 AM PDT Description: OpenSearch is a community-driven, open-source search and analytics suite. We identified CVE-2026-19311, a missing authorization issue in the Execute Monitor API of the OpenSearch Alerting plugin. This issue may allow an authenticated user with the alerting_full_access role to read, modify, or delete arbitrary index data via a crafted inline monitor request with unintentional data source and input index parameters. Impacted versions: OpenSearch Alerting Plugin (open-source, self-managed): - Affected: 2.4.0 through 2.19.5, 3.0.0 through 3.7.0 - Fixed: 2.19.6, 3.8.0 Amazon OpenSearch Service (AWS Managed): - Affected: All domains running engine versions 2.4 through 3.5 - Fixed: Service software R20260428-P3 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.

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