CVE-2026-78581

Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to unauthorized data modification via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). Under certain conditions, an authenticated user could reference another user's AI Assistant conversation identifier to access or modify a conversation they do not own. Successful exploitation requires knowledge of a hard-to-guess identifier.

CVSS v3 4.2 MEDIUM

4.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://discuss.elastic.co/t/kibana-8-16-3-8-17-2-security-update-esa-2026-51/387446	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:elastic:kibana::::::::
	cpe:2.3:a:elastic:kibana::::::::

History

No history.

Information

Published : 2026-08-25 13:19

Updated : 2026-09-02 14:10

NVD link : CVE-2026-78581

Mitre link : CVE-2026-78581

CVE.ORG link : CVE-2026-78581

JSON object : View

Products Affected

elastic

kibana

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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