CVE-2026-72645 — Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service

CVE-2026-72645

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

Description (CNA)

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 (CNA)

Vendor / product	Versions
Elastic / Elasticsearch	affected 8.0.0 through 8.19.19; affected 9.0.0 through 9.4.4; affected 9.5.0

CWE

CWE-789

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.