CVE-2026-18420
High · 8.8CVSS
8.8
EPSS
—
Published
Aug 20, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
|---|
Related vulnerabilities
- CVE-2026-104852 GraphQL Tools provides utilities for building, stitching, and mocking GraphQL schemas. CWE-1321
- CVE-2026-104849 Tinypool is a minimal Node.js worker thread pool implementation. CWE-1321
- CVE-2026-104848 Tinypool is a minimal Node.js worker thread pool implementation. CWE-1321
- CVE-2026-104183 stream-json is a micro-library of stream components for processing JSON and JSONC with a… CWE-1321
- CVE-2026-102992 piscina is a node.js worker pool implementation. CWE-1321
- CVE-2026-101908 Axios is a promise-based HTTP client for the browser and Node.js. CWE-1321
- CVE-2026-101909 Axios is a promise-based HTTP client for the browser and Node.js. CWE-1321
- CVE-2026-101902 Axios is a promise-based HTTP client for the browser and Node.js. CWE-1321