CVE-2026-8743 Open5GS AMF/MME context.c ran_ue_find_by_amf_ue_ngap_id improper authorization
Remote attackers can bypass authorization checks in Open5GS AMF/MME components, potentially accessing restricted functions without proper credentials.
- 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-2026-8743?
CVE-2026-8743 is a medium-severity missing authorization 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 vulnerability was found in Open5GS up to 2.7.6. This impacts the function ran_ue_find_by_amf_ue_ngap_id of the file src/amf/context.c of the component AMF/MME. Performing a manipulation results in improper authorization. It is possible to initiate the attack remotely. The exploit has been made public and could be used. The patch is named 5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1. It is suggested to install a patch to address this issue.
Which versions are affected by CVE-2026-8743?
It affects 1 product.
Products include Open5gs Open5gs.
How do I fix CVE-2026-8743?
No fix has been published for CVE-2026-8743 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-8743 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8743 exists.
Other vulnerabilities in Open5gs Open5gs
Sources
Also known as GHSA-9vhj-8h2m-3g3m.