CVE-2026-84942

This stored cross-site scripting (XSS) vulnerability affects OpenSearch Dashboards . The root cause is a flaw in the checkForFunctionProperty validation routine within the Vega expression function, which failed to recurse into arrays of objects, allowing a function property nested inside an array...

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

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...