CVE-2026-8123: Open5GS NSSF message.c ogs_sbi_discovery_option_add_snssais denial of service

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-05-08 · updated 2026-06-17
Weakness: CWE-404

Description

A vulnerability was determined in Open5GS up to 2.7.7. This impacts the function ogs_sbi_discovery_option_add_snssais in the library /lib/sbi/message.c of the component NSSF. This manipulation causes denial of service. It is possible to initiate the attack 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.

Affected products

Open5GS: through 2.7.7

References

https://github.com/open5gs/open5gs/
https://github.com/open5gs/open5gs/issues/4436
https://vuldb.com/submit/808426
https://vuldb.com/vuln/361910
https://vuldb.com/vuln/361910/cti

Get alerted when CVE-2026-8123 or the next vulnerability affects your stack