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CVE-2026-18420

RCE via Prototype Pollution in OpenSearch Dashboards PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
AWS / Amazon OpenSearch Serviceaffected 3.0.0 before 3.8.0
OpenSearch / OpenSearch Dashboardsaffected 3.0.0 before 3.8.0

CWE

CWE-1321

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.