ElasticCVE-2026-63144
Elasticsearch: denial of service
Medium6.5CVE-2026-63144 · Published Jul 21, 2026 · updated Aug 3, 2026
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Elasticsearch Product | >= 9.4.0, <= 9.4.3 | No fix yet |
| >= 9.3.0, <= 9.3.7 | No fix yet | |
| >= 8.19.0, <= 8.19.18 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-674
More Elastic advisories
All Elastic| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Jul 21 | Elastic Kibana: improper authorization | Medium5.0 | No fix yet |
| Jul 21 | Elastic Kibana: missing authorization | Medium4.3 | No fix yet |
| Jul 21 | Elastic Kibana: improper authorization | Medium4.3 | No fix yet |
| Jul 21 | Elastic Kibana: information disclosure | Medium4.3 | No fix yet |
| Jul 21 | Elastic Kibana: resource exhaustion | Medium6.5 | No fix yet |
| Jul 21 | Elastic Kibana: resource exhaustion | Medium6.5 | No fix yet |