High 8.1Published Aug 12, 2026

CVE-2026-19311Missing Authorization in Execute Monitor API in OpenSearch Alerting Plugin

Updated under an hour ago (2026-10-19 10:00 UTC)

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It affects AWS OpenSearch and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-475
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: AMZN
NVD analysis: Awaiting Analysis
Record last updated: Aug 13, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

AWS OpenSearch aws:opensearch (from the name)	from 2.4 through 3.5	CNA record
Github OpenSearch github:opensearch (from the name)	from 2.4.0 through 2.19.5; from 3.0.0 through 3.7.0	CNA record

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-notes, patch
https://aws.amazon.com/security/security-bulletins/2026-078-aws/vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.