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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://aws.amazon.com/about-aws/whats-new/2026/03/amazon-opensearch-service-ve…
ff89ba41-3aa1-4d27-914a-91399e9639e5
https://aws.amazon.com/security/security-bulletins/2026-078-aws/
ff89ba41-3aa1-4d27-914a-91399e9639e5
https://github.com/opensearch-project/alerting/security/advisories/GHSA-xxpg-q3…
ff89ba41-3aa1-4d27-914a-91399e9639e5