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CVE PROGRAM SOURCE RECORD8.7 High

CVE-2026-18420

RCE via Prototype Pollution in OpenSearch Dashboards

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

AWS Amazon OpenSearch Service

Default version status: unaffected

  • 3.0.0 to < 3.8.0affected

OpenSearch OpenSearch Dashboards

Default version status: unaffected

  • 3.0.0 to < 3.8.0affected

References