CVE-2026-78598 Incorrect Authorization in Kibana Leading to Unauthorized Cross-Space Exposure of Machine Learning Job Data
An authenticated user with ML privileges can expose machine learning job data across all Kibana spaces, bypassing space isolation controls.
- 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-2026-78598?
CVE-2026-78598 is a medium-severity missing authorization vulnerability in Elastic Kibana, published on 2 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Incorrect Authorization (CWE-863) in the Kibana machine learning feature can lead to information disclosure via Exploiting Incorrectly Configured Access Control Security Levels (CAPEC-180). An authenticated user holding machine learning job management privileges within a single Kibana space could cause a job's saved object to become accessible across all spaces in the Kibana instance, without holding access rights to those additional spaces.
Weakness: CWE-863
Which versions are affected by CVE-2026-78598?
It affects 1 product.
Products include Elastic Kibana.
How do I fix CVE-2026-78598?
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-2026-78598 being exploited?
There is no known exploitation of CVE-2026-78598 in the wild and no public exploit code.
Other vulnerabilities in Elastic Kibana
Sources
Also known as GHSA-x87p-86f2-9mg9, MINI-3r55-vpw4-37p9, MINI-4xx2-vx64-mm8r, MINI-h739-pq99-xgxp, MINI-hm6r-2rmf-4jmp, MINI-jxf4-9qf2-2wgv and 2 more.