Elasticsearch 5.3.1, based on Lucene 6.4.2, has been released as a bugfix update and is available for deployment on Elastic Cloud. This release addresses several issues from version 5.3.0, including a bug related to the multi data path configuration that incorrectly added paths instead of overwriting them, and provides a check for residual data in default paths. It also introduces a safeguard against out-of-memory errors caused by misconfigured shingle and CJK token filters, which can generate excessive paths and consume heap space. Cross-cluster search now supports clusters with X-Pack Security enabled, and other improvements include a change in the Netty receive predictor size and a fix for issues with sliced scrolls and reindex-from-remote operations. Users are encouraged to upgrade and share feedback through social media or the forum, and any issues can be reported on GitHub.