Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://aws.amazon.com/security/security-bulletins/2026-081-aws/
- https://docs.aws.amazon.com/opensearch-service/latest/developerguide/service-sof
- https://github.com/opensearch-project/sql/security/advisories/GHSA-g4jr-343c-fvj
- https://opensearch.org/artifacts/by-version/?_gl=1*d14pqp*_up*MQ..*_ga*Nzc5NTAxN
- https://opensearch.org/artifacts/by-version/?_gl=1*d14pqp*_up*MQ..*_ga*Nzc5NTAxN
FAQ
What is CVE-2026-18428?
CVE-2026-18428 is a vulnerability with a CVSS score of 8.8 (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 wo...
How severe is CVE-2026-18428?
CVE-2026-18428 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-18428?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.