CVE-2026-7779 Denial of service in Open5GS
Remote attackers can cause a denial of service in Open5GS by manipulating the authentication-subscription endpoint, affecting 5G core network availability.
- 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-2026-7779?
CVE-2026-7779 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 security flaw has been discovered in Open5GS up to 2.7.7. Affected is the function udm_nudr_dr_handle_subscription_authentication of the file /src/udm/nudr-handler.c of the component authentication-subscription Endpoint. Performing a manipulation results in denial of service. Remote exploitation of the attack is possible. The exploit has been released to the public and may 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-2026-7779?
How do I fix CVE-2026-7779?
No fix has been published for CVE-2026-7779 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-2026-7779 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7779 exists.
Sources
Also known as GHSA-c78f-m7pg-c3p7.