CVE-2026-7518 Open5GS AMF SBI Endpoint sdmsubscription-notify amf_namf_callback_handle_sdm_data_change_notify denial of service
Remote attackers can cause denial of service in Open5GS AMF SBI Endpoint by manipulating sdm subscription notification arguments.
- 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-2026-7518?
CVE-2026-7518 is a medium-severity denial of service vulnerability in Open5GS, published on 1 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw has been found in Open5GS up to 2.7.7. This issue affects the function amf_namf_callback_handle_sdm_data_change_notify of the file /namf-callback/v1/{id}/sdmsubscription-notify of the component AMF SBI Endpoint. This manipulation of the argument changeItem.newValue causes denial of service. The attack can be initiated remotely. The exploit has been published and may 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-2026-7518?
How do I fix CVE-2026-7518?
No fix has been published for CVE-2026-7518 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-2026-7518 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7518 exists.
Sources
Also known as GHSA-ccv7-fr4h-54hj.