CVE-2026-78583

Incorrect Authorization in Kibana Leading to Privilege Escalation

State: Published
Severity: 8.1 High
Published: Sep 3, 2026
Updated: Sep 3, 2026
Reserved: Aug 24, 2026

Description

Incorrect Authorization (CWE-863) in Kibana can lead to privilege escalation via Input Data Manipulation (CAPEC-153). Elasticsearch cluster privilege declarations originating from integration packages were not validated before being used to mint credentials for enrolled Elastic Agents. A user holding Fleet management privileges could therefore cause every Elastic Agent on a targeted policy to receive a credential carrying arbitrarily elevated Elasticsearch cluster privileges, up to and including full cluster administration.

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N	elastic

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
KibanaElastic	8.0.0 through 8.19.20Affected 9.0.0 through 9.4.5Affected 9.5.0 through 9.5.2Affected

References

https://discuss.elastic.co/t/kibana-8-19-21-9-4-6-9-5-3-security-update-esa-2026-140/390158

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