Description
OpenSearch is a community-driven, open source fork of Elasticsearch and Kibana. There is an issue with the implementation of fine-grained access control rules (document-level security, field-level security and field masking) where they are not correctly applied to the indices that back data streams potentially leading to incorrect access authorization. OpenSearch 1.3.7 and 2.4.0 contain a fix for this issue. Users are advised to update. There are no known workarounds for this issue.
Remediation
References
https://github.com/opensearch-project/security/commit/f7cc569c9d3fa5d5432c76c854eed280d45ce6f4
https://github.com/opensearch-project/security/security/advisories/GHSA-wmx7-x4jp-9jgg