CVE-2026-19311
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Execute Monitor API Authorization Bypass in Amazon OpenSearch

Publication date: 2026-08-12

Last updated on: 2026-08-12

Assigner: AMZN

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.

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Meta Information

Published
2026-08-12
Last Modified
2026-08-12
Generated
2026-08-13
AI Q&A
2026-08-12
EPSS Evaluated
N/A
NVD
CVE-2026-19311
EUVD
EUVD-2026-57420

Affected Vendors & Products

Showing 7 associated CPEs
Vendor Product Version / Range
amazon opensearch_alerting_plugin From 2.4.0 (inc) to 2.19.5 (inc)
amazon opensearch_alerting_plugin From 3.0.0 (inc) to 3.7.0 (inc)
amazon opensearch_alerting_plugin to 3.8.0 (exc)
amazon opensearch_alerting_plugin to 2.19.6 (exc)
amazon opensearch_alerting_plugin to 2.19.7 (inc)
amazon opensearch_service to 3.5 (inc)
amazon opensearch_alerting_plugin *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-475 The behavior of this function is undefined unless its control parameter is set to a specific value.

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Executive Summary

CVE-2026-19311 is a missing authorization vulnerability in the Execute Monitor API of the Amazon OpenSearch Alerting plugin. It allows an authenticated user with the alerting_full_access role to read, modify, or delete arbitrary index data by exploiting unintentional data source and input index parameters in a crafted inline monitor request.

Detection Guidance

To detect this vulnerability, check if your OpenSearch Alerting plugin versions are between 2.4.0-2.19.5 or 3.0.0-3.7.0. Use commands like 'curl -XGET https://<opensearch-host>/_plugins/_alerting/monitors/_execute -H 'Content-Type: application/json' -d '{"data_sources":["*"],"input_indices":["*"]}' to test for unauthorized access. Monitor logs for suspicious Execute Monitor API requests.

Impact Analysis

This vulnerability enables an attacker to access, alter, or delete sensitive data stored in OpenSearch indices without proper authorization. It could lead to data breaches, unauthorized modifications, or data loss, especially if critical system indices are targeted.

Compliance Impact

This vulnerability could violate compliance requirements such as GDPR or HIPAA by enabling unauthorized access to personal or sensitive health data. Organizations may face legal penalties, reputational damage, and loss of trust due to data exposure or tampering.

Mitigation Strategies

Immediately upgrade OpenSearch Alerting plugin to versions 2.19.6, 3.8.0 or later. For Amazon OpenSearch Service, apply service software update R20260428-P3. As a temporary measure, restrict the alerting_full_access role to trusted administrators only.

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