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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Elastic | Elasticsearch | 8.0.0 – ≤ 8.19.19, 9.0.0 – ≤ 9.4.4, 9.5.0 | — |
Advisories 1
- WID-SEC-2026-2841 Elasticsearch: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 8, 2026