CVE-2026-63144
Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via a specially crafted search request submitted by a low-privileged authenticated user. A user with read-level index access can submit a request that triggers unbounded recursive processing within the Elasticsearch query evaluation component, causing a fatal error that terminates the affected node. In single-node deployments, this results in complete service outage; in multi-node clusters, it causes repeated node restarts and sustained availability degradation.
- Score
- CVSS 3.1 6.5 Medium
- Status
- Analyzed - security@elastic.co
- Published
- 2026-07-21
- Last modified
- 2026-10-24
- Weaknesses
- CWE-674
Affected products
References
- https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-68/388571
