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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.

PUBLISHED Reserved 2026-05-03 | Published 2026-05-03 | 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

2026-05-03:Advisory disclosed
2026-05-03:VulDB entry created
2026-05-03:VulDB entry last update

Credits

FrankyLin (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/submit/805699 exploit

vuldb.com/submit/805700 exploit

github.com/open5gs/open5gs/issues/4410 exploit

vuldb.com/vuln/360883 (VDB-360883 | Open5GS UDR nudr-handler.c udr_nudr_dr_handle_subscription_context denial of service) vdb-entry technical-description

vuldb.com/vuln/360883/cti (VDB-360883 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/805699 (Submit #805699 | Open5gs UDR v2.7.7 Denial of Service) third-party-advisory

vuldb.com/submit/805700 (Submit #805700 | Open5gs UDR v2.7.7 Denial of Service (Duplicate)) third-party-advisory

github.com/open5gs/open5gs/issues/4410 issue-tracking

github.com/open5gs/open5gs/issues/4411 exploit issue-tracking

github.com/open5gs/open5gs/ product

cve.org (CVE-2026-7707)

nvd.nist.gov (CVE-2026-7707)

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