# CVE-2026-72676: Improper Control of Generation of Code in Fleet Server Leading to Code Injection

> Attackers can execute arbitrary code by injecting script syntax into Kibana output configuration identifiers processed by Fleet Server.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Aug 2026
- **Updated:** 13 Aug 2026
- **Also known as:** GHSA-hfcx-p43w-9wvx

## What is CVE-2026-72676?

CVE-2026-72676 is a medium-severity code injection vulnerability in Elastic Kibana, published on 13 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Improper Control of Generation of Code ('Code Injection') (CWE-94) in Fleet Server can lead to the execution of attacker-supplied script content via Code Injection (CAPEC-242). Kibana accepted an identifier for an output configuration without restricting it to safe characters. That identifier is later placed into a server-side script that Fleet Server builds as part of routine agent policy processing, so script syntax embedded in the identifier became part of the script that was executed rather than being treated as data.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2026-72676?

It affects 1 product.


Products: Elastic Kibana.

## How do I fix CVE-2026-72676?

No fix has been published for CVE-2026-72676 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-72676 being exploited?

There is no known exploitation of CVE-2026-72676 in the wild and no public exploit code.

## Other vulnerabilities in Elastic Kibana

- [CVE-2019-7609](https://insights.sbomify.com/CVE-2019-7609/): Kibana Arbitrary Code Execution (critical 9.8, exploited in the wild)
- [CVE-2025-25015](https://insights.sbomify.com/CVE-2025-25015/): Kibana arbitrary code execution via prototype pollution (critical 9.9)
- [CVE-2024-37288](https://insights.sbomify.com/CVE-2024-37288/): Deserialization in Kibana (critical 9.9)
- [CVE-2023-31415](https://insights.sbomify.com/CVE-2023-31415/): Code injection in Kibana (critical 9.9)
- [CVE-2018-17245](https://insights.sbomify.com/CVE-2018-17245/): Information disclosure in Kibana (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-72676 and fix it if it is affected.

What it is: CVE-2026-72676 is a medium-severity code injection vulnerability in Elastic Kibana, published on 13 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-72676 in the wild and no public exploit code.

Affected product: Elastic Kibana. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2026-72676/ (Markdown: https://insights.sbomify.com/CVE-2026-72676/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-72676
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-72676
- OSV: https://osv.dev/vulnerability/CVE-2026-72676

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-72676/
Summaries are generated and may contain mistakes; the official description above is the record.