CVE-2026-78595 Missing Authorization in Kibana Fleet Plugin Leading to Cross-Space Agent Data Disclosure
An authenticated user with read-level Fleet privileges can access agent metadata and diagnostics from other Kibana spaces due to missing authorization checks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-78595?
CVE-2026-78595 is a medium-severity missing authorization vulnerability in Elastic Kibana, published on 3 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Missing Authorization in Kibana Leading to Information Disclosure / Missing Authorization (CWE-862) in the Kibana Fleet feature can lead to information disclosure via Privilege Abuse (CAPEC-122). An authenticated user holding read-level Fleet agent privileges in one Kibana space could enumerate agent metadata and access diagnostic content belonging to agents enrolled in other Kibana spaces.
Weakness: CWE-862
Which versions are affected by CVE-2026-78595?
2 open source packages ship an affected version, including kibana and elk.
| Package | Affected | Fixed in |
|---|---|---|
kibana Bitnami | From 9.1.0 | 9.4.6, 9.5.3 |
elk Bitnami | From 9.1.0 | 9.4.6, 9.5.3 |
How do I fix CVE-2026-78595?
Upgrade kibana to a fixed version for your release line: 9.4.6 or 9.5.3.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-78595 being exploited?
There is no known exploitation of CVE-2026-78595 in the wild and no public exploit code.
Sources
Also known as BIT-elk-2026-78595, BIT-kibana-2026-78595, GHSA-xvx8-crx2-xjwv, MINI-5mwg-vhgg-j3mp, MINI-829q-vphj-whg2, MINI-jq4g-p4v3-v5vq and 2 more.