CVE-2026-18420 UNKNOWN

CVE-2026-18420

Published: 2026-08-20

Description

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.

AI Intelligence Brief

AI Intelligence

Analyzing vulnerability vectors…