CVE-2026-108121 PUBLISHED

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

Assigner: NCSC.ch
Reserved: 09.10.2026 Published: 19.10.2026 Updated: 19.10.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 6.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	Low
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	High
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	Koozali
Product	SME Server
Versions	Default: unaffected Version 11.0rc1-215 is affected

Credits

Brian Mariani from DigitalCanion SA finder

References

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

Problem Types

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

Impacts

CAPEC-242 Code Injection