Vulnerability · Published Jul 21, 2026 · Assigned by elastic
CVE-2026-56145Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service
Medium 6.5
In plain English
A medium-severity uncontrolled resource consumption in Elasticsearch from Elastic. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Official description
Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). A low-privileged authenticated user with permission to execute EQL sequence queries against an index they control can send a specially crafted query that triggers excessive memory consumption, causing the Elasticsearch node to crash.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Elastic | Elasticsearch | 9.4.0 – through 9.4.38.0.0 – through 8.19.179.0.0 – through 9.3.6 |
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H