CVE-2026-78593 Improper Control of Generation of Code in Kibana Leading to Privilege Escalation
Authenticated users with Fleet privileges can inject code into server-side templates to modify Elasticsearch pipelines beyond their authorized permissions.
- 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-2026-78593?
CVE-2026-78593 is a medium-severity code injection 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
An insufficiently validated configuration field in Kibana's Cribl integration allows an authenticated user holding Kibana Fleet management privileges to inject attacker-controlled expressions into a server-side script template, resulting in an Elasticsearch ingest pipeline being written beyond the caller's authorized Elasticsearch permissions.
Weakness: CWE-94
Which versions are affected by CVE-2026-78593?
2 open source packages ship an affected version, including kibana and elk.
| Package | Affected | Fixed in |
|---|---|---|
kibana Bitnami | From 8.0.0 | 8.19.21, 9.4.6, 9.5.3 |
elk Bitnami | From 8.0.0 | 8.19.21, 9.4.6, 9.5.3 |
How do I fix CVE-2026-78593?
Upgrade kibana to a fixed version for your release line: 8.19.21, 9.4.6 or 9.5.3.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-78593 being exploited?
There is no known exploitation of CVE-2026-78593 in the wild and no public exploit code.
Sources
Also known as BIT-elk-2026-78593, BIT-kibana-2026-78593, GHSA-6q7w-4cg4-7827, MINI-27jh-hmf8-f3w8, MINI-c9hh-663q-rf9g, MINI-mvc5-hgcp-xj33 and 5 more.