CVE-2026-18428

HIGH

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.

CVSS v3.1 Score

8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Published: 8/13/2026Modified: 8/14/2026

Related Intelligence (1)

LOWVulnerability

CVE-2026-18428 - OpenSearch SQL Plugin - Async Query Validation Bypass

<p><b>Bulletin ID:</b> 2026-081-AWS<br> <b>Scope:</b> AWS<br> <b>Content Type:</b> Important (requires attention)<br> <b>Publication Date:</b> 08/13/2026 10:30 AM PDT</p> <p><b>Description:</b></p> <p>OpenSearch SQL plugin is a plugin that enables SQL and PPL query capabilities on OpenSearch clusters, including direct query integration with external data sources via Apache Spark. An issue exists w

CVE-2026-18428
AWS Security Bulletins

References (5)

https://aws.amazon.com/security/security-bulletins/2026-081-aws/https://docs.aws.amazon.com/opensearch-service/latest/developerguide/service-software.htmlhttps://github.com/opensearch-project/sql/security/advisories/GHSA-g4jr-343c-fvjmhttps://opensearch.org/artifacts/by-version/?_gl=1*d14pqp*_up*MQ..*_ga*Nzc5NTAxNzM2LjE3ODM1NTA2NDA.*_ga_BQV14XK08F*czE3ODM1NTA2NDAkbzEkZzEkdDE3ODM1NTA3MTQkajU2JGwwJGg3NTc4ODY0OTM.#release-2-19-6https://opensearch.org/artifacts/by-version/?_gl=1*d14pqp*_up*MQ..*_ga*Nzc5NTAxNzM2LjE3ODM1NTA2NDA.*_ga_BQV14XK08F*czE3ODM1NTA2NDAkbzEkZzEkdDE3ODM1NTA3MTQkajU2JGwwJGg3NTc4ODY0OTM.#release-3-7-0