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As of 09/20/2026, within CyStack's analyzed data, Amazon OpenSearch Service has 2 security vulnerabilities published in the last 90 days. Of these, 2 are rated High or Critical. None of these vulnerabilities is listed in the CISA KEV catalog. CyStack recommends that organizations and individual users remediate applicable vulnerabilities as soon as possible.
CyStack does not yet have sufficient official-source data to identify the latest version of Amazon OpenSearch Service and determine which vulnerabilities affect that version.
CyStack VulnScan continuously discovers assets, validates vulnerabilities, and helps security teams prioritize remediation across the organization.
Explore CyStack VulnScan| Vulnerability | Exploitation status | Fix | Published | Severity |
|---|---|---|---|---|
CVE-2026-84942Stored Cross-Site Scripting via Vega Expression Function Bypass in OpenSearch Dashboards | Exploitation statusNot known exploited | FixYes | Published09/08/2026 | SeverityMedium |
CVE-2026-77811Stored Cross-Site Scripting via Integration Template Asset in OpenSearch Dashboards | Exploitation statusNot known exploited | FixYes | Published08/21/2026 | SeverityMedium |
CVE-2026-18420RCE via Prototype Pollution in OpenSearch Dashboards | Exploitation statusNot known exploited | FixYes | Published08/20/2026 | SeverityHigh |
CVE-2026-75897Uncontrolled Resource Consumption in Capabilities Route in OpenSearch Dashboards | Exploitation statusNot known exploited | FixYes | Published08/18/2026 | SeverityHigh |
