CVE-2026-8288 Open5GS SMF gsm-handler.c denial of service
Remote attackers can cause a denial of service in Open5GS SMF by manipulating GSM messages, requiring a patch for mitigation.
- 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-2026-8288?
CVE-2026-8288 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 determined in Open5GS up to 2.7.7. This affects the function gsm_handle_pdu_session_modification_qos_flow_descriptions of the file src/smf/gsm-handler.c of the component SMF. Executing a manipulation of the argument n1SmMsg can lead to denial of service. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.
Weakness: CWE-404
Which versions are affected by CVE-2026-8288?
It affects 1 product.
Products include Open5gs Open5gs.
How do I fix CVE-2026-8288?
No fix has been published for CVE-2026-8288 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-2026-8288 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8288 exists.
Other vulnerabilities in Open5gs Open5gs
Sources
Also known as GHSA-x779-6vcw-95p6.