CVE-2026-63144 Details
Description
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.
A denial-of-service vulnerability has been identified in Elasticsearch versions 8.19.0 prior to 8.19.19, as well as in 9.3.0 prior to 9.3.8 and 9.4.0 prior to 9.4.4. This vulnerability allows a low-privileged authenticated user with read-level index access to submit a specially crafted search request. The request triggers unbounded recursive processing in the query evaluation component, leading to a fatal error that crashes the affected node. In single-node deployments, this causes a complete service outage. In multi-node clusters, it results in repeated node restarts and ongoing availability issues.
Users can upgrade to Elasticsearch versions 8.19.19, 9.3.8, or 9.4.4 to address this vulnerability. For those unable to upgrade, no workarounds are available.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 22, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-68/388571 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-674 | Uncontrolled Recursion | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| elastic elasticsearch | >= 8.19.0, < 8.19.19 >= 9.3.0, < 9.3.8 >= 9.4.0, < 9.4.4 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 3, 2026 | Initial Analysis | [email protected] |
| Jul 22, 2026 | CVE Modified | CISA-ADP |
| Jul 21, 2026 | New CVE Received | [email protected] |