CVE-2026-108121
Received Received - Intake

Apache Configuration Injection in SME Server

Publication date: 2026-10-19

Last updated on: 2026-10-19

Assigner: Switzerland Government Common Vulnerability Program

Description
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.

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Meta Information

Published
2026-10-19
Last Modified
2026-10-19
Generated
2026-10-19
AI Q&A
2026-10-19
EPSS Evaluated
N/A
NVD
CVE-2026-108121
EUVD
EUVD-2026-104069

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Koozali SME Server 11.0rc1-215

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
CWE-96 The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes code syntax before inserting the input into an executable resource, such as a library, configuration file, or template.
CWE-400 The product does not properly control the allocation and maintenance of a limited resource.

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Executive Summary

This vulnerability allows an attacker with high privileges to inject reserved Apache configuration directives during domain creation in koozali's SME Server version 11.0rc1-215. This corrupts the httpd.conf file, preventing Apache from starting after a server reboot and causing a denial-of-service (DoS) condition for the web server and its hosted virtual hosts.

Detection Guidance

Check if Apache fails to start after a reboot, which may indicate corrupted httpd.conf due to injected directives. Inspect httpd.conf for unexpected reserved Apache configuration entries. Review domain creation logs for unauthorized modifications.

Impact Analysis

If exploited, this vulnerability can disrupt your web server and all hosted websites, making them inaccessible. It requires high-privilege access, so only authorized users or compromised accounts with elevated permissions could trigger this issue.

Compliance Impact

This vulnerability causes a denial-of-service (DoS) condition by corrupting Apache configuration files, preventing the web server from starting. This could disrupt access to critical services, potentially violating compliance requirements for availability under standards like GDPR and HIPAA, which mandate reliable access to personal and health data.

Mitigation Strategies

Restrict high-privilege user access to domain creation functions. Review and remove any injected Apache directives in httpd.conf. Update SME Server to a patched version if available. Monitor Apache service status after reboots.

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