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

Descripción

Improper input validation 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. The checkForFunctionProperty validation routine failed to recurse into arrays of objects, allowing a function property nested inside an array to bypass validation.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• https://github.com/opensearch-project/OpenSearch-Dashboards/releases/tag/3.6.0 patch
• https://github.com/opensearch-project/OpenSearch-Dashboards/releases/tag/2.19.5 patch
• https://aws.amazon.com/security/security-bulletins/2026-102-aws/ vendor-advisory