CVE-2025-15686 Open5GS HSS Service fd_msg_sess_get denial of service
Remote attackers can cause a denial of service in Open5GS HSS Service by manipulating the Session-Id argument in fd_msg_sess_get.
- 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-2025-15686?
CVE-2025-15686 is a medium-severity denial of service vulnerability in Open5GS, published on 12 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability has been found in Open5GS up to 2.7.6. Affected by this issue is the function fd_msg_sess_get of the component HSS Service. Such manipulation of the argument Session-Id leads to denial of service. The attack may be performed from remote. The exploit has been disclosed to the public and may be used. The project locked and limited conversation to collaborators.
Weakness: CWE-404
Which versions are affected by CVE-2025-15686?
How do I fix CVE-2025-15686?
No fix has been published for CVE-2025-15686 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-2025-15686 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-15686 exists.
Sources
Also known as GHSA-hwwm-2gq7-f4rr.