# 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.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 3 Sep 2026
- **Updated:** 3 Sep 2026
- **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, MINI-mxwm-mcf7-wpxg, MINI-rghj-fq3x-749q, MINI-x4gw-f2pq-34vw, MINI-xgmj-j85f-7hpg, MINI-xjgc-rcp2-7hx6

## 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 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2026-78593?

2 open source packages ship an affected version, including kibana and elk.


| Package | Ecosystem | 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.

## Is CVE-2026-78593 being exploited?

There is no known exploitation of CVE-2026-78593 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-78593 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-78593 in the wild and no public exploit code.

Affected packages and fixed versions:
- kibana (Bitnami): affected from 8.0.0; fixed in 8.19.21, 9.4.6, 9.5.3
- elk (Bitnami): affected from 8.0.0; fixed in 8.19.21, 9.4.6, 9.5.3

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-78593/ (Markdown: https://insights.sbomify.com/CVE-2026-78593/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-78593
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-78593
- OSV: https://osv.dev/vulnerability/CVE-2026-78593

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-78593/
Summaries are generated and may contain mistakes; the official description above is the record.