Denial of Service Vulnerability in Elasticsearch by Elastic
CVE-2026-56145

6.5MEDIUM

Key Information:

Vendor

Elastic
Status
Elastic
Vendor
CVE Published:
21 July 2026

What is CVE-2026-56145?

A vulnerability in Elasticsearch allows a low-privileged authenticated user to execute specially crafted EQL sequence queries, potentially causing excessive memory consumption and leading to a denial of service. This issue arises when the user interacts with an index they control, resulting in the application crashing due to resource overutilization.

Affected Version(s)

Elasticsearch 9.4.0 <= 9.4.3

Elasticsearch 8.0.0 <= 8.19.17

Elasticsearch 9.0.0 <= 9.3.6

References

https://discuss.elastic.co/t/elasticsearch-8-19-18-9-3-7-...

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.