---
id: "CVE-2026-108121"
kind: "vulnerability"
aliases: ["CVE-2026-108121"]
title: "SME Server: domain creation lets admins corrupt Apache config, blocking web startup"
severity: "medium"
cvss: 6.9
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["apache", "infrastructure", "self-hosted", "sme-server"]
not_affected_if: ["auth-required"]
published_at: "2026-10-19T06:17:22+00:00"
first_seen_at: "2026-10-23T21:57:17+00:00"
updated_at: "2026-10-25T03:40:54+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-108121", "first_seen_at": "2026-10-23T21:57:17+00:00"}]
---

# SME Server: domain creation lets admins corrupt Apache config, blocking web startup

In koozali SME Server 11.0rc1-215, the domain creation function lets a high-privileged user inject reserved Apache directives into httpd.conf. After a reboot, Apache fails to start, taking down the web server and its virtual hosts.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Confirm the installed build with `cat /etc/e-smith-release` (unknown if the sources name a different check)
- Look for unexpected directives in `/etc/httpd/conf/httpd.conf` and run `httpd -t` to see whether the config parses

## Timeline

- 2026-10-23T21:57:17+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-108121

## From the sources

Brian Mariani from DigitalCanion SA has discovered a  vulnerability in the domain creation functionality of koozali's 
SME Server version 11.0rc1-215, allowing an attacker with high privileges 
to inject reserved Apache configuration directives, corrupting 
httpd.conf and preventing Apache from starting after a server reboot, 
resulting in a denial-of-service (DoS) condition affecting the web 
server and its hosted virtual hosts.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_