## Elasticsearch 8.19.21, 9.4.6, 9.5.2 Security Update (ESA-2026-196)

- 種別: advisory
- 関連技術: elasticsearch
- 公開日時: 2026-10-06T18:50:30.000Z
- 情報源: Elastic Security Announcements (https://discuss.elastic.co/t/elasticsearch-8-19-21-9-4-6-9-5-2-security-update-esa-2026-196/390870)
- パーマリンク: https://vulnpulse.app/items/elastic-security-65d1379837b2

Uncontrolled Recursion in Elasticsearch Leading to Denial of Service Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to Denial of Service via a specially crafted, deeply nested request submitted to the aggregation feature of the search API. Elasticsearch contains an uncontrolled recursion weakness in its search aggregation processing. An authenticated user with read access to a single index can submit a specially crafted request containing deeply nested aggregation definitions. Processing this request triggers unbounded recursive execution that exhausts the server process's availab…