CVE-2026-27600 HomeBox affected by Blind SSRF
Authenticated users can exploit the notifier feature to perform blind SSRF, enabling internal service enumeration via network state side-channels.
- 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-2026-27600?
CVE-2026-27600 is a medium-severity server-side request forgery vulnerability in sysadminsmedia homebox, published on 3 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
HomeBox is a home inventory and organization system. Prior to 0.24.0-rc.1, the notifier functionality allows authenticated users to specify arbitrary URLs to which the application sends HTTP POST requests. No validation or restriction is applied to the supplied host, IP address, or port. Although the application does not return the response body from the target service, its UI behavior differs depending on the network state of the destination. This creates a behavioral side-channel that enables internal service enumeration. This vulnerability is fixed in 0.24.0-rc.1.
Weakness: CWE-918
Which versions are affected by CVE-2026-27600?
It affects 1 product.
Products include Sysadminsmedia Homebox.
How do I fix CVE-2026-27600?
No fix has been published for CVE-2026-27600 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-27600 being exploited?
There is no known exploitation of CVE-2026-27600 in the wild and no public exploit code.
Other vulnerabilities in sysadminsmedia homebox
Sources
Also known as GHSA-cm7p-5mg5-82pm.