SEPTEMBER 19, 2026
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Case File

CVE-2026-18420

HIGH · CVSS 8.8 EPSS 0.66% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-20 · Last synced 2026-09-18

CyberRota Analysis

AI-Generated

The Time Series Visual Builder (TSVB) plugin in OpenSearch Dashboards is vulnerable to improper input validation, allowing authenticated remote users to exploit the metrics visualization API with crafted JSON payloads, leading to arbitrary code execution on the server. This vulnerability poses a significant risk due to its potential for remote code execution, making it critical for organizations using OpenSearch Dashboards to prioritize upgrading to version 3.8 or later to mitigate this threat.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
remote code execution code execution

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-18420
Severity
HIGH
CVSS
8.8
EPSS
0.66%

Original NVD 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.