Description
Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via Input Data Manipulation (CAPEC-153). An authenticated user holding only low-privileged index creation permissions can submit a single request containing a specially crafted, malformed custom analysis definition that is resolved recursively without a cycle or depth check, exhausting the thread stack 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 | — |
Advisories 1
- WID-SEC-2026-2841 Elasticsearch: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 8, 2026