CVE intelligence

CVE-2026-19311

Vulnerability intelligence

Published Aug 12, 2026Sources checked Oct 27, 2026

8.1HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-19311 and is rated High severity with a CVSS score of 8.1. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

AWS Security Bulletins guidance

Vendor revision: Oct 21, 2026

Vendor remediation details

Impacted versions: OpenSearch Alerting Plugin (open-source, self-managed): - Affected: 2.4.0 through 2.19.5, 3.0.0 through 3.7.0 - Fixed: 2.19.6, 3.8.0 Amazon OpenSearch Service (AWS Managed): - Affected: All domains running engine versions 2.4 through 3.5 - Fixed: Service software R20260428-P3 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.

CISA KEVNot listedBased on the latest collected catalog

EPSS0.6%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-19311?

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.

Source: NVD