Elasticsearch Uncontrolled Resource Consumption via EQL Query
CVE-2026-56145 Published on July 21, 2026
Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service
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.
Vulnerability Analysis
CVE-2026-56145 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2026-56145 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2026-56145
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Affected Versions
Elasticsearch:- Version 9.4.0, <= 9.4.3 is affected.
- Version 8.0.0, <= 8.19.17 is affected.
- Version 9.0.0, <= 9.3.6 is affected.