CVE-2026-8223 Open5GS sm-policies Endpoint pcf_sess_sbi_discover_and_send denial of service
Remote attackers can cause denial of service in Open5GS via the sm-policies endpoint, affecting 5G core network availability.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8223?
CVE-2026-8223 is a medium-severity denial of service vulnerability in Open5gs Open5gs, published on 10 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was found in Open5GS up to 2.7.7. Affected by this vulnerability is the function pcf_sess_sbi_discover_and_send of the component sm-policies Endpoint. Performing a manipulation results in denial of service. It is possible to initiate the attack 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-2026-8223?
It affects 1 product.
Products include Open5gs Open5gs.
How do I fix CVE-2026-8223?
No fix has been published for CVE-2026-8223 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-2026-8223 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8223 exists.
Other vulnerabilities in Open5gs Open5gs
Sources
Also known as GHSA-q4gr-3x5p-634j.