CVE-2026-18428

SQL Query Validation Bypass in OpenSearch Direct Query

Published Aug 13, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title SQL Query Validation Bypass in OpenSearch Direct Query
First Time appeared Aws
Aws opensearch
Github
Github opensearch
Weaknesses CWE-693
CPEs cpe:2.3:a:aws:opensearch:*:*:*:*:*:*:*:*
cpe:2.3:a:github:opensearch:*:*:*:*:*:*:*:*
Vendors & Products Aws
Aws opensearch
Github
Github opensearch
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
AMZN
Published
Updated
Aug 13, 2026, 5:57 PM
Reserved
Jul 30, 2026, 6:25 PM
Status
Awaiting Analysis
Published
Aug 13, 2026, 6:17 PM
Modified
Aug 14, 2026, 7:04 PM