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 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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Elastic | Elasticsearch | 8.12.0 – ≤ 8.19.22, 9.0.0 – ≤ 9.3.8, 9.4.0 – ≤ 9.4.7, 9.5.0 – ≤ 9.5.4 | — |
Advisories 1
- WID-SEC-2026-3784 Elasticsearch: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 13, 2026