CVE-2026-78583 — Incorrect Authorization in Kibana Leading to Privilege Escalation

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Elastic / Kibana	affected 8.0.0 through 8.19.20; affected 9.0.0 through 9.4.5; affected 9.5.0 through 9.5.2

CWE

CWE-863

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.