Vulnerability · Published Aug 13, 2026 · Assigned by AMZN
CVE-2026-18428SQL Query Validation Bypass in OpenSearch Direct Query
High 8.8
In plain English
A high-severity security flaw in Opensearch from AWS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 63% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)1.0%top 37.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AWS | Opensearch | 2.13 – through 3.5 |
| Github | Opensearch | 2.13 – through 3.6 |
Weakness: CWE-693 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://opensearch.org/artifacts/by-version/?_gl=1*d14pqp*_up*MQ..*_ga*Nzc5NTAxNzM2LjE3ODM1NTA2NDA.*_ga_BQV14XK08F*czE3ODM1NTA2NDAkbzEkZzEkdDE3ODM1NTA3MTQkajU2JGwwJGg3NTc4ODY0OTM.#release-3-7-0 patch
- https://opensearch.org/artifacts/by-version/?_gl=1*d14pqp*_up*MQ..*_ga*Nzc5NTAxNzM2LjE3ODM1NTA2NDA.*_ga_BQV14XK08F*czE3ODM1NTA2NDAkbzEkZzEkdDE3ODM1NTA3MTQkajU2JGwwJGg3NTc4ODY0OTM.#release-2-19-6 patch
- https://docs.aws.amazon.com/opensearch-service/latest/developerguide/service-software.html patch, release-notes
- https://github.com/opensearch-project/sql/security/advisories/GHSA-g4jr-343c-fvjm release-notes, vendor-advisory
- https://aws.amazon.com/security/security-bulletins/2026-081-aws/ vendor-advisory