CVE-2026-78606

Incorrect Authorization in Kibana Leading to Unauthorized Disclosure, Modification, and Deletion of Data

State: Published
Severity: 4.2 Medium
Published: Sep 1, 2026
Updated: Sep 1, 2026
Reserved: Aug 24, 2026

Description

Incorrect Authorization (CWE-863) in Kibana can lead to unauthorized disclosure, modification, and deletion of data via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). Where two authenticated principals originating from different authentication realms share the same username value, one could read, modify, and delete the other's private Elastic AI Assistant Knowledge Base entries.

Scores

CVSS	Score	Vector	Source
3.1	4.2 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N	elastic

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
KibanaElastic	8.19.11 through 8.19.20Affected 9.3.0 through 9.4.5Affected 9.5.0 through 9.5.1Affected

References

https://discuss.elastic.co/t/kibana-8-19-21-9-4-6-9-5-2-security-update-esa-2026-142/390093

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.