CVE-2026-7536 Open5GS BSF pcfBindings bsf_sess_add_by_ip_address denial of service
Remote attackers can cause denial of service in Open5GS BSF by manipulating the ipv4Addr argument in pcfBindings.
- 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-2026-7536?
CVE-2026-7536 is a medium-severity denial of service vulnerability in Open5GS, published on 1 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was determined in Open5GS up to 2.7.7. This vulnerability affects the function bsf_sess_add_by_ip_address of the file /nbsf-management/v1/pcfBindings of the component BSF. Executing a manipulation of the argument ipv4Addr can lead to denial of service. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. 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-2026-7536?
How do I fix CVE-2026-7536?
No fix has been published for CVE-2026-7536 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-2026-7536 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7536 exists.
Sources
Also known as GHSA-286x-7qf6-x2h4.