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VULNERABILITIES

CVE-2026-84942 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: AMZNCVSS-B:8.7 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://aws.amazon.com/security/security-bulletins/2026-102-aws/ AMZN
https://github.com/opensearch-project/OpenSearch-Dashboards/releases/tag/2.19.5 AMZN
https://github.com/opensearch-project/OpenSearch-Dashboards/releases/tag/3.6.0 AMZN

Weakness Enumeration

CWE-IDCWE NameSource
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')AMZN

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-84942
NVD Published Date:
Sep 8, 2026
NVD Last Modified:
Sep 9, 2026
Source:
AMZN
CVE-2026-84942 Details - Not Deferred