CVE-2026-8187 Open5GS UPF gtp-path.c _gtpv1_u_recv_cb resource consumption
Remote attackers can cause resource consumption in Open5GS UPF via the GTP-U receive callback, leading to denial of service.
- 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-2026-8187?
CVE-2026-8187 is a medium-severity denial of service vulnerability in Open5gs Open5gs, published on 9 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw has been found in Open5GS up to 2.7.7. This impacts the function _gtpv1_u_recv_cb of the file src/upf/gtp-path.c of the component UPF. Executing a manipulation can lead to resource consumption. The attack may be performed from remote. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-8187?
It affects 1 product.
Products include Open5gs Open5gs.
How do I fix CVE-2026-8187?
No fix has been published for CVE-2026-8187 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-2026-8187 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8187 exists.
Other vulnerabilities in Open5gs Open5gs
Sources
Also known as GHSA-rr89-wx3j-43cc.