ElasticCVE-2026-78605
Elasticsearch: request smuggling
Medium5.9CVE-2026-78605 · Published Sep 1, 2026 · updated Sep 2, 2026
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Elasticsearch Product | >= 8.18.0, <= 8.19.19 | No fix yet |
| >= 9.0.0, <= 9.4.4 | No fix yet | |
| <= 9.5.0 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-444
More Elastic advisories
All Elastic| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 1 | Elasticsearch: missing authorization | Medium5.4 | No fix yet |
| Sep 1 | Elastic Kibana: missing authorization | Medium6.5 | No fix yet |
| Sep 1 | Elastic Kibana: path traversal | High7.3 | No fix yet |
| Sep 1 | Elastic Kibana: missing authorization | Medium4.3 | No fix yet |
| Sep 1 | Elastic Kibana: missing authorization | Medium4.3 | No fix yet |
| Sep 1 | Elastic Kibana: improper authorization | Medium4.2 | No fix yet |