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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-68/388571	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:elastic:elasticsearch::::::::
	cpe:2.3:a:elastic:elasticsearch::::::::
	cpe:2.3:a:elastic:elasticsearch::::::::

History

03 Aug 2026, 16:07

Type	Values Removed	Values Added
References	~~() https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-68/388571 -~~	() https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-68/388571 - Vendor Advisory
First Time		Elastic elasticsearch Elastic
CPE		cpe:2.3:a:elastic:elasticsearch::::::::

21 Jul 2026, 23:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-21 23:18

Updated : 2026-08-03 16:07

NVD link : CVE-2026-63144

Mitre link : CVE-2026-63144

CVE.ORG link : CVE-2026-63144

JSON object : View

Products Affected

elastic

elasticsearch

CWE

CWE-674

Uncontrolled Recursion

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