CVE-2026-7707 Open5GS UDR nudr-handler.c udr_nudr_dr_handle_subscription_context denial of service
Remote attackers can cause a denial of service in Open5GS UDR by manipulating the pei argument in subscription context handling.
- 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-2026-7707?
CVE-2026-7707 is a medium-severity denial of service vulnerability in Open5GS, published on 3 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in Open5GS up to 2.7.7. Impacted is the function udr_nudr_dr_handle_subscription_context of the file /src/udr/nudr-handler.c of the component UDR. The manipulation of the argument pei results in denial of service. The attack can be launched remotely. The exploit has been made public and could be used. 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-2026-7707?
How do I fix CVE-2026-7707?
No fix has been published for CVE-2026-7707 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-2026-7707 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7707 exists.
Sources
Also known as GHSA-c646-h573-22rf.