CVE-2026-56145: CWE-400 Uncontrolled Resource Consumption in Elastic Elasticsearch
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.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-56145) in Elasticsearch involves uncontrolled resource consumption (CWE-400) through excessive memory allocation triggered by EQL sequence queries. A low-privileged authenticated user with permission to run EQL sequence queries on an index they control can send a crafted query that causes the Elasticsearch node to consume excessive memory and crash, resulting in denial of service. The vulnerability affects Elasticsearch versions 8.0.0, 9.0.0, and 9.4.0. There is no vendor advisory or patch currently available, and no known exploits in the wild have been reported.
Potential Impact
An attacker with low privileges and the ability to execute EQL sequence queries on a controlled index can cause the Elasticsearch node to crash by triggering excessive memory consumption. This results in denial of service, impacting availability of the Elasticsearch service. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict or monitor the ability of users to execute EQL sequence queries, especially those with low privileges. Consider limiting access to trusted users and applying resource usage limits if possible.
CVE-2026-56145: CWE-400 Uncontrolled Resource Consumption in Elastic Elasticsearch
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.
CVSS v3.1
Score 6.5medium
Affected software
pkg:maven/org.elasticsearch/elasticsearchRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-56145) in Elasticsearch involves uncontrolled resource consumption (CWE-400) through excessive memory allocation triggered by EQL sequence queries. A low-privileged authenticated user with permission to run EQL sequence queries on an index they control can send a crafted query that causes the Elasticsearch node to consume excessive memory and crash, resulting in denial of service. The vulnerability affects Elasticsearch versions 8.0.0, 9.0.0, and 9.4.0. There is no vendor advisory or patch currently available, and no known exploits in the wild have been reported.
Potential Impact
An attacker with low privileges and the ability to execute EQL sequence queries on a controlled index can cause the Elasticsearch node to crash by triggering excessive memory consumption. This results in denial of service, impacting availability of the Elasticsearch service. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict or monitor the ability of users to execute EQL sequence queries, especially those with low privileges. Consider limiting access to trusted users and applying resource usage limits if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- elastic
- Date Reserved
- 2026-06-19T11:01:02.535Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a5fd4a51010f89cc22494e3
Added to database: 07/21/2026, 20:20:53 UTC
Last enriched: 07/21/2026, 20:36:06 UTC
Last updated: 07/21/2026, 21:08:52 UTC
Views: 3
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