CVE-2026-78605

MediumCVSS 5.9/10Last modified Sep 2, 2026

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.

Metrics

CVSS 3.1 5.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-444

Affected software

Vendor	Product	Versions
Elastic	Elasticsearch	>= 8.18.0, <= 8.19.19; >= 9.0.0, <= 9.4.4; 9.5.0

References

https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-9-5-1-security-update-esa-2026-141/390092Vendor Advisory

Timeline

Published: Sep 1, 2026
Last modified: Sep 2, 2026
NVD status: Analyzed

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