CVE-2026-8123 Open5GS NSSF message.c ogs_sbi_discovery_option_add_snssais denial of service
Remote attackers can cause a denial of service in Open5GS NSSF via the discovery option function, requiring attention from 5G network operators.
- 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-2026-8123?
CVE-2026-8123 is a medium-severity denial of service vulnerability in Open5gs Open5gs, published on 8 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was determined in Open5GS up to 2.7.7. This impacts the function ogs_sbi_discovery_option_add_snssais in the library /lib/sbi/message.c of the component NSSF. This manipulation causes denial of service. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. 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-2026-8123?
It affects 1 product.
Products include Open5gs Open5gs.
How do I fix CVE-2026-8123?
No fix has been published for CVE-2026-8123 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-2026-8123 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8123 exists.
Other vulnerabilities in Open5gs Open5gs
Sources
Also known as GHSA-fxh4-4qxc-cq82.