CVE-2026-18428 PUBLISHED

SQL Query Validation Bypass in OpenSearch Direct Query

Assigner: AMZN
Reserved: 30.07.2026 Published: 13.08.2026 Updated: 13.08.2026

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 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
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 8.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	AWS
Product	Opensearch
Versions	Default: unaffected affected from 2.13 to 3.5 (incl.)

Vendor	Github
Product	Opensearch
Versions	Default: unaffected affected from 2.13 to 3.6 (incl.)

CVE-2026-18428 PUBLISHED

SQL Query Validation Bypass in OpenSearch Direct Query

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Product Status

References

Problem Types

Impacts