CVE-2026-90937 froxlor before 2.2.5 nginx/Apache Configuration Injection via subdomain redirect URL
Authenticated users can inject newlines into subdomain redirect URLs to corrupt web server configurations, causing denial of service or response hijacking.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90937?
CVE-2026-90937 is a critical code injection vulnerability in froxlor, published on 14 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-93
Which versions are affected by CVE-2026-90937?
How do I fix CVE-2026-90937?
No fix has been published for CVE-2026-90937 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-90937 being exploited?
There is no known exploitation of CVE-2026-90937 in the wild and no public exploit code.
Sources
Also known as GHSA-c3p2-mj7v-5mrc, GHSA-r2fc-pw6p-x28w.