CVE-2026-7780 Open5GS smf-registrations Endpoint udm-sm.c udm_state_operational denial of service
Remote attackers can cause a denial of service in Open5GS by exploiting a flaw in the UDM state operational function.
- 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-2026-7780?
CVE-2026-7780 is a medium-severity denial of service vulnerability in Open5GS, published on 4 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A weakness has been identified in Open5GS up to 2.7.7. Affected by this vulnerability is the function udm_state_operational of the file /src/udm/udm-sm.c of the component smf-registrations Endpoint. Executing a manipulation can lead to denial of service. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Weakness: CWE-404
Which versions are affected by CVE-2026-7780?
How do I fix CVE-2026-7780?
No fix has been published for CVE-2026-7780 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-7780 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7780 exists.
Sources
Also known as GHSA-6c8x-4gc8-74gg.