CVE-2026-78605
Published:September 01, 2026
Updated:September 02, 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 Packages
https://github.com/elastic/elasticsearch.git (GITHUB):
Affected version(s) =v9.5.0 <v9.5.1Fix Suggestion:
Update to version v9.5.1https://github.com/elastic/elasticsearch.git (GITHUB):
Affected version(s) >=v8.18.0 <v8.19.20Fix Suggestion:
Update to version v8.19.20https://github.com/elastic/elasticsearch.git (GITHUB):
Affected version(s) >=v9.0.0 <v9.4.5Fix Suggestion:
Update to version v9.4.5Related Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')