Missing Authorization in Kibana Leading to Unauthorized Disclosure of Fleet Deployment Metadata

published 2026-09-01 2 mo ago modified 2026-09-02 2 mo ago also EUVD-2026-69571

cvss: 4.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits: 0; none known

Missing Authorization (CWE-862) in Kibana can lead to information disclosure via Exploiting Incorrectly Configured Access Control Security Levels (CAPEC-180). An authenticated user holding minimal Elasticsearch privileges could bypass Kibana feature authorization and space access controls, resulting in the unauthorized disclosure of Fleet deployment metadata from the default Kibana space.

Patch / fix

fixed in 1

elastic kibana 9.4.6

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 mo ago (2026-09-01)

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products

Elastic Kibana

Classification

Weakness

CWE-862 Missing Authorization

References

discuss.elastic.co /t/kibana-9-4-6-9-5-1-security-update-esa-2026-149/390069
vendor-advisory

Sources

CVE List CVE-2026-78603
NVD CVE-2026-78603

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary