CVE-2026-103005 — Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service

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 with connector management privileges could cause the cluster to allocate an uncontrolled amount of memory when connector resources with an excessively large `description` field are created and subsequently accessed, exhausting available heap memory and crashing the affected node.

Affected (CNA)

Vendor / product	Versions
Elastic / Elasticsearch	affected 8.12.0 through 8.19.22; affected 9.0.0 through 9.3.8; affected 9.4.0 through 9.4.7; affected 9.5.0 through 9.5.4

CWE

CWE-789

References

https://discuss.elastic.co/t/elasticsearch-8-19-23-9-4-8-9-5-5-security-update-esa-2026-195/390869

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.