CVE-2025-37727: Elastic Elasticsearch

Medium severity, CVSS 5.7. EPSS: 0.2% chance of exploitation in the next 30 days.

Insertion of sensitive information in log file in Elasticsearch can lead to loss of confidentiality under specific preconditions when auditing requests to the reindex API https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-reindex

Affected products

• Elastic Elasticsearch: from 7.0.0, up to and including 7.17.29; from 8.0.0, before 8.18.8 (fixed in 8.18.8); from 8.19.0, before 8.19.5 (fixed in 8.19.5); from 9.0.0, before 9.0.8 (fixed in 9.0.8); from 9.1.0, before 9.1.5 (fixed in 9.1.5)

Published 2025-10-10. Last modified 2026-10-08.