Medium severity · published Sep 2, 2026
CVE-2026-78601
Missing Authorization in Kibana Leading to Unauthorized Elasticsearch Index Data Exposure
5.5
CVSS
0.3%
EPSS
No
On KEV
Description
Missing Authorization (CWE-862) in Kibana can lead to information disclosure via Privilege Abuse (CAPEC-122). An authorization control was not applied to a Kibana Entity Store configuration operation, allowing an authenticated user with elevated Kibana privileges to indirectly cause a background task to read from Elasticsearch indices that user is not authorized to access. Derived entity data from those indices is then exposed through the entity store output.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KI
Kibana · Elastic
9.4.0 through 9.4.4 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-78601
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-78601
Vendor Advisory
https://discuss.elastic.co/t/kibana-9-4-5-security-update-esa-2026-147/390107
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