CVE-2026-78596 Missing Authorization in Kibana Leading to Unauthorized Cross-Space Write Operations
An authenticated user with limited read access can perform unauthorized write operations across all Kibana spaces, bypassing intended security boundaries.
- 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-2026-78596?
CVE-2026-78596 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 Unauthorized Modification of Data / Missing Authorization (CWE-862) in Kibana can lead to unauthorized modification of data via Privilege Abuse (CAPEC-122). An authenticated user holding Security read-level access in a single Kibana space could trigger Entity Analytics migration operations that perform privileged writes across all Kibana spaces, regardless of that user's actual access scope.
Weakness: CWE-862
Which versions are affected by CVE-2026-78596?
2 open source packages ship an affected version, including kibana and elk.
| Package | Affected | Fixed in |
|---|---|---|
kibana Bitnami | From 8.18.3 | 8.19.21, 9.4.6, 9.5.3 |
elk Bitnami | From 8.18.3 | 8.19.21, 9.4.6, 9.5.3 |
How do I fix CVE-2026-78596?
Upgrade kibana to a fixed version for your release line: 8.19.21, 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-2026-78596 being exploited?
There is no known exploitation of CVE-2026-78596 in the wild and no public exploit code.
Sources
Also known as BIT-elk-2026-78596, BIT-kibana-2026-78596, GHSA-fcr2-g7h7-m264, MINI-3jv9-2vr7-g8x9, MINI-943m-g8jr-jvxf, MINI-cx6p-r6rq-x2cj and 5 more.