CVE-2026-84942

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Source

https://cve.org/CVERecord?id=CVE-2026-84942

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84942.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-84942

Published

2026-09-08T19:41:25Z

Modified

2026-09-10T03:48:29Z

Severity

6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N CVSS Calculator

Summary

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

Details

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.

Database specific

{
    "cna_assigner": "AMZN",
    "cwe_ids": [
        "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84942.json"
}

References

Affected packages

Git / github.com/opensearch-project/opensearch-dashboards

Affected ranges

Type

GIT

Repo

https://github.com/opensearch-project/opensearch-dashboards

Events

Introduced

3d6dd638d021f383a4c6ab750c83a1d30d3787b3

Fixed

bc90b6a50a0989323442aba09ffd2ff270d5340f

Fixed

47091b2bb937be28e29cde7c3d2c3c9ee6803c27

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "v2.0.0"
        },
        {
            "last_affected": "v3.5.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84942.json"