CVE-2026-90937
CRITICAL
NVD
CVSS Score
9.9
Severity
CRITICAL
Published
Sep 14, 2026
Vendor
unknown
Description
froxlor versions before 2.2.5 fail to validate newline characters in subdomain redirect URLs, allowing authenticated customers to inject arbitrary nginx or Apache configuration directives. Attackers can supply URLs containing literal newlines that are written verbatim into vhost config files during cron rebuild, enabling web server configuration corruption, denial of service, or hijacking of HTTP responses across hosted domains.