CVE-2026-107203 Foreman: domain and subnet interface api skips host search filters
Attackers with limited host permissions can view and modify network interfaces of hosts they are not authorized to access via the domain and subnet API.
- 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-2026-107203?
CVE-2026-107203 is a medium-severity missing authorization vulnerability in Red Hat Satellite 6, published on 12 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An **incorrect authorization** flaw has been found in **network interface handling** in the **Foreman** package. The domain and subnet interface API checks only that the caller holds a host permission. It does not apply the search limit on that permission, so the request is answered from every interface on the domain or subnet. A low-privileged network attacker or user must already be allowed to view some hosts and to view a domain or subnet shared with other hosts. They can request that domain or subnet's interfaces. The response includes interface records of hosts they are not allowed to view. If the attacker or user is also allowed to edit some hosts, they can submit a change to one of those interfaces. The interface is then saved with that change.
Weakness: CWE-863
Which versions are affected by CVE-2026-107203?
How do I fix CVE-2026-107203?
No fix has been published for CVE-2026-107203 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-107203 being exploited?
There is no known exploitation of CVE-2026-107203 in the wild and no public exploit code.
Sources
Also known as GHSA-j63r-4x8m-hxcf.