CVE-2026-7707: Open5GS UDR nudr-handler.c udr_nudr_dr_handle_subscription_context denial of service

Severity: medium (CVSS 4.3 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: none known
Published: 2026-05-03 · updated 2026-06-17
Weakness: CWE-404

Description

A vulnerability was found in Open5GS up to 2.7.7. Impacted is the function udr_nudr_dr_handle_subscription_context of the file /src/udr/nudr-handler.c of the component UDR. The manipulation of the argument pei results in denial of service. The attack can be launched remotely. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.

Affected products

Open5GS: 2.7.0, 2.7.1, 2.7.2, 2.7.3, 2.7.4, 2.7.5 (+2)

References

https://github.com/open5gs/open5gs/
https://github.com/open5gs/open5gs/issues/4410
https://github.com/open5gs/open5gs/issues/4411
https://vuldb.com/submit/805699
https://vuldb.com/submit/805700
https://vuldb.com/vuln/360883
https://vuldb.com/vuln/360883/cti
https://github.com/open5gs/open5gs/issues/4410
https://vuldb.com/submit/805699
https://vuldb.com/submit/805700

Get alerted when CVE-2026-7707 or the next vulnerability affects your stack