CVE-2026-108121

Koozali - SME Server Improper Input Validation in domain Creation Leads to Denial of Service

State: Published
Severity: 6.9 Medium
Published: Oct 19, 2026
Updated: Oct 19, 2026
Reserved: Oct 9, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:H/SC:N/SI:L/SA:H/E:P/S:P/AU:Y/R:A/RE:M/U:Amber	NCSC.ch

Weaknesses

CWE-20 Improper input validation
CWE-96 Improper neutralization of directives in statically saved code ('static code injection')
CWE-400 — Uncontrolled Resource Consumption

Affected Products

Product	Versions
SME ServerKoozali	11.0rc1-215Affected

References

https://digitalcanion.com/en/security-research/#vendor=koozali

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