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Findings

CVE-2026-84942

CVE-2026-84942 - Stored Cross-Site Scripting via Vega Expression Function Bypass in OpenSearch Dashboards

Published Sep 9, 2026 · Amazon Web Services

Bulletin ID: 2026-102-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/08/2026 12:30 PM PDT Description: A stored cross-site scripting (XSS) issue in the Vega expression function implementation in OpenSearch Dashboards allows a remote authenticated actor with dashboard write permissions to execute arbitrary JavaScript in the context of other users' browser sessions by saving a crafted Vega visualization. Affedted products & versions: OpenSearch Dashboards (open-source,

Code

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No public source repository is identified for this product.

Timeline

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  1. Sep 9, 2026 · AWS Security Bulletins

    Detected

    Bulletin ID: 2026-102-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/08/2026 12:30 PM PDT Description: A stored cross-site scripting (XSS) issue in the Vega expression function implementation in OpenSearch Dashboards allows a remote authenticated actor with dashboard write permissions to execute arbitrary JavaScript in the context of other users' browser sessions

Sources

  • AWS Security BulletinsVendor advisoryCVE-2026-84942

    Bulletin ID: 2026-102-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/08/2026 12:30 PM PDT Description: A stored cross-site scripting (XSS) issue in the Vega expression function implementation in OpenSearch Dashboards allows a remote authenticated

    aws.amazon.com