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Description

A security flaw has been discovered in Open5GS up to 2.7.7. Affected is the function udm_nudr_dr_handle_subscription_authentication of the file /src/udm/nudr-handler.c of the component authentication-subscription Endpoint. Performing a manipulation results in denial of service. Remote exploitation of the attack is possible. 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.

PUBLISHED Reserved 2026-05-04 | Published 2026-05-04 | Updated 2026-05-05 | Assigner VulDB




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
MEDIUM: 4.3CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
4.0AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR

Problem types

Denial of Service

Timeline

2026-05-04:Advisory disclosed
2026-05-04:VulDB entry created
2026-05-04:VulDB entry last update

Credits

FrankyLin (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/360976 (VDB-360976 | Open5GS authentication-subscription Endpoint nudr-handler.c udm_nudr_dr_handle_subscription_authentication denial of service) vdb-entry technical-description

vuldb.com/vuln/360976/cti (VDB-360976 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/806249 (Submit #806249 | Open5gs UDM v2.7.7 Denial of Service) third-party-advisory

github.com/open5gs/open5gs/issues/4418 exploit issue-tracking

github.com/open5gs/open5gs/ product

cve.org (CVE-2026-7779)

nvd.nist.gov (CVE-2026-7779)

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