CVE-2026-72645
Published:August 13, 2026
Updated:August 31, 2026
Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user holding only read privileges on a single index can submit one small, specially crafted search request that causes an excessively large memory allocation, exhausting the JVM heap and terminating the affected node.
Affected Packages
https://github.com/elastic/elasticsearch.git (GITHUB):
Affected version(s) >=v9.0.0 <v9.4.5Fix Suggestion:
Update to version v9.4.5https://github.com/elastic/elasticsearch.git (GITHUB):
Affected version(s) >=v8.0.0 <v8.19.20Fix Suggestion:
Update to version v8.19.20https://github.com/elastic/elasticsearch.git (GITHUB):
Affected version(s) =v9.5.0 <v9.5.1Fix Suggestion:
Update to version v9.5.1org.elasticsearch:elasticsearch (JAVA):
Affected version(s) >=9.0.0 <9.4.5Fix Suggestion:
Update to version 9.4.5org.elasticsearch:elasticsearch (JAVA):
Affected version(s) =9.5.0 <9.5.1Fix Suggestion:
Update to version 9.5.1org.elasticsearch:elasticsearch (JAVA):
Affected version(s) >=8.0.0 <8.19.20Fix Suggestion:
Update to version 8.19.20Related Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Memory Allocation with Excessive Size Value
EPSS
Base Score:
0.29