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CVE-2026-72645

Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service

Published: Aug 13, 2026Updated: Aug 13, 2026 Sources: CVE List NVDCWE-789
6.5MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 79.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
OpenVAS

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-789

Affected Products

Elastic
commercial·USaka elasticsearch co., elastic.co
ElasticsearchOn-premDatabase
Databases

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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References

https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-9-5-1-security-update-esa-2026-116/389502
discuss.elastic.co

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