CVE-2026-19311

Description

Missing authorization in the Execute Monitor API in Amazon OpenSearch Alerting plugin might allow an authenticated remote user to read, modify, or delete arbitrary index data via a crafted inline monitor request with unintentional data source and input index parameters.

CVSS Vector

References

• https://aws.amazon.com/about-aws/whats-new/2026/03/amazon-opensearch-service-version-3-5/
• https://aws.amazon.com/security/security-bulletins/2026-078-aws/
• https://github.com/opensearch-project/alerting/security/advisories/GHSA-xxpg-q3wh-685q