CVE-2026-56145

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.

Score

CVSS 3.1 6.5 Medium

Status

Analyzed - security@elastic.co

Published

2026-07-21

Last modified

2026-10-24

Weaknesses

CWE-400

Affected products

• Elasticsearch (Elastic)

References

• https://discuss.elastic.co/t/elasticsearch-8-19-18-9-3-7-9-4-4-security-update-esa-2026-57/388556