CVE-2026-7583 Open5GS BSF context.c bsf_sess_find_by_ipv6prefix denial of service
Remote attackers can cause a denial of service in Open5GS BSF by manipulating IPv6 prefix arguments, requiring immediate attention from 5G network operators.
- 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-2026-7583?
CVE-2026-7583 is a medium-severity denial of service vulnerability in Open5GS, published on 1 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw has been found in Open5GS up to 2.7.7. This issue affects the function bsf_sess_find_by_ipv6prefix of the file /src/bsf/context.c of the component BSF. This manipulation of the argument ipv6Prefix causes denial of service. It is possible to initiate the attack remotely. The exploit has been published and may be used. 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-2026-7583?
How do I fix CVE-2026-7583?
No fix has been published for CVE-2026-7583 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-2026-7583 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7583 exists.
Sources
Also known as GHSA-rqx4-v9gm-wjfh.