CVE-2026-18428
Received Received - Intake

SQL Query Validation Bypass in OpenSearch SQL Plugin

Publication date: 2026-08-13

Last updated on: 2026-08-13

Assigner: AMZN

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.

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Meta Information

Published
2026-08-13
Last Modified
2026-08-13
Generated
2026-08-13
AI Q&A
2026-08-13
EPSS Evaluated
N/A
NVD
CVE-2026-18428
EUVD
EUVD-2026-58178

Affected Vendors & Products

Showing 6 associated CPEs
Vendor Product Version / Range
opensearch_project opensearch_sql_plugin From 2.13 (inc) to 3.6 (inc)
opensearch_project opensearch_sql_plugin 2.19.6
opensearch_project opensearch_sql_plugin 3.7
amazon amazon_opensearch_service From 2.13 (inc) to 3.5 (inc)
amazon amazon_opensearch_service 3.5
opensearch sql_plugin *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-693 The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

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Executive Summary

This vulnerability is a SQL query validation bypass in the Flint extension query handler of the OpenSearch SQL plugin. A remote authenticated attacker with async query access can exploit it by sending a crafted SQL query to the direct query endpoint to execute arbitrary code on Apache Spark workers.

Impact Analysis

If exploited, this vulnerability allows attackers to run arbitrary code on Spark workers, potentially leading to data breaches, unauthorized access, or system compromise. Users relying on the direct query feature with Spark integration are most at risk.

Mitigation Strategies
  • Upgrade OpenSearch SQL plugin to version 3.7 or 2.19.6 (open-source) or apply the latest service software update (Amazon OpenSearch Service).
  • For Amazon OpenSearch Service, ensure automatic updates are enabled or manually apply the patch during the next off-peak window.
  • If using the direct query feature, restrict async query access to trusted users until the patch is applied.

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