CVE-2026-18428 HIGH

CVE-2026-18428: SQL Query Validation Bypass in OpenSearch Direct Query

Vendor Aws
Product Opensearch
Weakness CWE-693
Published August 13, 2026
Last update August 13, 2026

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

A SQL query validation bypass in the Flint extension query handler in the OpenSearch SQL plugin allows a remote authenticated actor with async query access to execute arbitrary code on Apache Spark workers by sending a crafted SQL query to the direct query endpoint.

Key dates

02Disclosure timeline

August 13, 2026 CVE published

Related vulnerabilities

04Related CVE