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High severity · published Sep 3, 2026
CVE-2026-78583
Incorrect Authorization in Kibana Leading to Privilege Escalation
8.1
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KI
Kibana · Elastic
8.0.0 through 8.19.20; 9.0.0 through 9.4.5; 9.5.0 through 9.5.2 · source: vendor, NVD
Affected product
KI
Kibana
Elastic
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-78583
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-78583
Vendor Advisory
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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