CVE-2026-8290 Open5GS SMF nsmf-handler.c smf_nsmf_handle_update_data_in_vsmf denial of service
Remote attackers can cause a denial of service in Open5GS SMF via the nsmf-handler.c update function, impacting 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-2026-8290?
CVE-2026-8290 is a medium-severity denial of service vulnerability in Open5gs Open5gs, published on 11 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. This issue affects the function smf_nsmf_handle_update_data_in_vsmf of the file /src/smf/nsmf-handler.c of the component SMF. The manipulation results in denial of service. The attack can be executed remotely. 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-2026-8290?
It affects 1 product.
Products include Open5gs Open5gs.
How do I fix CVE-2026-8290?
No fix has been published for CVE-2026-8290 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-2026-8290 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8290 exists.
Other vulnerabilities in Open5gs Open5gs
Sources
Also known as GHSA-4c5m-7x4h-hr3w.