Description
Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') (CWE-444) in Elasticsearch can lead to information disclosure via HTTP Request Smuggling (CAPEC-33). Under specific proxy deployment configurations, a network attacker could obtain confidential responses intended for other authenticated users.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Elastic | Elasticsearch | 8.18.0 – ≤ 8.19.19, 9.0.0 – ≤ 9.4.4, 9.5.0 | — |
Advisories 1
- WID-SEC-2026-3131 Elasticsearch: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 8, 2026