CVE-2026-78603 Missing Authorization in Kibana Leading to Unauthorized Disclosure of Fleet Deployment Metadata
An authenticated user with minimal privileges can bypass access controls to view Fleet deployment metadata in Kibana.
- 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-2026-78603?
CVE-2026-78603 is a medium-severity missing authorization vulnerability in Elastic Kibana, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-78603?
It affects 1 product.
Products include Elastic Kibana.
How do I fix CVE-2026-78603?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-78603 being exploited?
There is no known exploitation of CVE-2026-78603 in the wild and no public exploit code.
Other vulnerabilities in Elastic Kibana
Sources
Also known as GHSA-68p4-ggq7-7vvg, MINI-6h6w-hwc3-rg44, MINI-8h5c-8275-88mx, MINI-c8x2-4rp6-9mhc, MINI-hxh6-fm4q-7j8m, MINI-jgr2-qq3p-cjwr and 1 more.