CVE-2026-8746 Open5GS NRF nghttp2-server.c discover_handler use after free
Remote attackers can exploit a use-after-free flaw in Open5GS NRF to potentially execute code or cause denial of service.
- 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-2026-8746?
CVE-2026-8746 is a medium-severity use after free vulnerability in Open5gs Open5gs, published on 17 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A security flaw has been discovered in Open5GS up to 2.7.7. Affected by this issue is the function discover_handler in the library /lib/sbi/nghttp2-server.c of the component NRF. The manipulation results in use after free. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-8746?
It affects 1 product.
Products include Open5gs Open5gs.
How do I fix CVE-2026-8746?
No fix has been published for CVE-2026-8746 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-8746 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8746 exists.
Other vulnerabilities in Open5gs Open5gs
Sources
Also known as GHSA-49g8-77wh-w2gp.