CVE-2026-63144

published 2026-07-21

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…

Priority P3 36 medium 6.5 CVSS 3.1

AV N AC L PR L UI N S U C N I N A H

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.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
elastic	elasticsearch	>= 8.19.0 < 8.19.19	8.19.19
elastic	elasticsearch	8.19.0 – 8.19.18	—
elastic	elasticsearch	>= 9.3.0 < 9.3.8	9.3.8
elastic	elasticsearch	9.3.0 – 9.3.7	—
elastic	elasticsearch	>= 9.4.0 < 9.4.4	9.4.4
elastic	elasticsearch	9.4.0 – 9.4.3	—

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CWE-674