CVE-2026-63144
Uncontrolled Recursion in Elasticsearch Leading to Denial of Service
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-674 |
| Vendor | elastic |
| Product | elasticsearch |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 21, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Elastic / Elasticsearch
9.4.0 ≤ 9.4.3 9.3.0 ≤ 9.3.7 8.19.0 ≤ 8.19.18