CVE-2026-8289 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 by manipulating qosFlowProfile arguments, requiring immediate 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-2026-8289?
CVE-2026-8289 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 vulnerability was identified in Open5GS up to 2.7.7. This vulnerability affects the function smf_nsmf_handle_update_data_in_vsmf of the file /src/smf/nsmf-handler.c of the component SMF. The manipulation of the argument qosFlowProfile leads to denial of service. Remote exploitation of the attack is possible. The exploit is publicly available and might 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-2026-8289?
It affects 1 product.
Products include Open5gs Open5gs.
How do I fix CVE-2026-8289?
No fix has been published for CVE-2026-8289 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-2026-8289 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8289 exists.
Other vulnerabilities in Open5gs Open5gs
Sources
Also known as GHSA-f67v-6p73-pvc5.