CVE-2026-78595

Missing Authorization in Kibana Fleet Plugin Leading to Cross-Space Agent Data Disclosure

State: Published
Severity: 4.3 Medium
Published: Sep 3, 2026
Updated: Sep 3, 2026
Reserved: Aug 24, 2026

Description

Missing Authorization in Kibana Leading to Information Disclosure / Missing Authorization (CWE-862) in the Kibana Fleet feature can lead to information disclosure via Privilege Abuse (CAPEC-122). An authenticated user holding read-level Fleet agent privileges in one Kibana space could enumerate agent metadata and access diagnostic content belonging to agents enrolled in other Kibana spaces.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	elastic

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
KibanaElastic	9.1.0 through 9.4.5Affected 9.5.0 through 9.5.2Affected

References

https://discuss.elastic.co/t/kibana-9-4-6-9-5-3-security-update-esa-2026-153/390160

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