CVE-2026-19311

Missing Authorization in Execute Monitor API in OpenSearch Alerting Plugin

State: Published
Severity: 8.6 High
Published: Aug 12, 2026
Updated: Aug 13, 2026
Reserved: Aug 7, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.6 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N	AMZN
3.1	8.1 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N	AMZN

Weaknesses

CWE-475 Undefined behavior for input to API

Affected Products

Product	Versions
OpenSearchAWS	2.4 through 3.5Affected
OpenSearchGithub	2.4.0 through 2.19.5Affected 3.0.0 through 3.7.0Affected

References

https://aws.amazon.com/about-aws/whats-new/2026/03/amazon-opensearch-service-version-3-5/release-notes
https://github.com/opensearch-project/alerting/security/advisories/GHSA-xxpg-q3wh-685qrelease-notespatch
https://aws.amazon.com/security/security-bulletins/2026-078-aws/vendor-advisory

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