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CVE-2026-18420

8.7 high SSVC exploitation: none Awaiting Analysis
NVD · CVE.org

Improper input validation in the Time Series Visual Builder (TSVB) plugin in OpenSearch Dashboards allows an authenticated remote user to execute arbitrary code on the server via a crafted JSON payload to the metrics visualization API endpoint. This issue is a form of prototype pollution that enables remote code execution. To remediate this issue, users should upgrade to OpenSearch Dashboards 3.8 or later.

Fix

Vendor advisories in the News 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 8.7NVD modified 2026-10-26 10:10

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 3