CVE-2026-78605: Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') in Elasticsearch Leading to Information Disclosure
Published Sep 1, 2026
·Updated
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 Software
1 affected component
Elasticsearch Elasticsearch
Event History
Sep 1, 2026
CVE Published
via MITRE·07:20 PM
Data Sourced
via MITRE·07:20 PM
DescriptionSeverityWeakness
Frequently Asked Questions
1
Which deployments are exposed to this issue?
Exposure is limited to specific proxy deployment configurations for Elasticsearch. The disclosed impact is the potential disclosure of confidential responses intended for other authenticated users.
2
Does an attacker need Elasticsearch credentials to exploit this?
No. The vulnerability is rated with no privileges required and can be targeted by a network attacker, although exploitation has high attack complexity.