CVE-2026-7779 - Open5GS authentication-subscription Endpoint nudr-handler.c udm_nudr_dr_handle_subscription_authentication denial of service

Back Back to CVE browser

MEDIUM

Open5GS authentication-subscription Endpoint nudr-handler.c udm_nudr_dr_handle_subscription_authentication denial of service

Published May 4, 2026

5.3

MEDIUM

CVSS 4.0

EPSS 0.63%

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.

Affected products

Vendor Open5gs Product Open5GS Default
n/a
- Version
  2.7.0
  Status
  affected
  Constraints
  -
- Version
  2.7.1
  Status
  affected
  Constraints
  -
- Version
  2.7.2
  Status
  affected
  Constraints
  -
- Version
  2.7.3
  Status
  affected
  Constraints
  -
- Version
  2.7.4
  Status
  affected
  Constraints
  -
- Version
  2.7.5
  Status
  affected
  Constraints
  -
- Version
  2.7.6
  Status
  affected
  Constraints
  -
- Version
  2.7.7
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Open5gs

Open5GS

n/a

Version	Status	Constraints
2.7.0	affected	-
2.7.1	affected	-
2.7.2	affected	-
2.7.3	affected	-
2.7.4	affected	-
2.7.5	affected	-
2.7.6	affected	-
2.7.7	affected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-404

Improper Resource Shutdown or Release

References (5)

https://github.com/open5gs/open5gs/
product
https://github.com/open5gs/open5gs/issues/4418
exploitissue-tracking
https://vuldb.com/submit/806249
third-party-advisory
https://vuldb.com/vuln/360976
vdb-entrytechnical-description
https://vuldb.com/vuln/360976/cti
signaturepermissions-required

Link	Providers	Tags
https://github.com/open5gs/open5gs/		product
https://github.com/open5gs/open5gs/issues/4418		exploitissue-tracking
https://vuldb.com/submit/806249		third-party-advisory
https://vuldb.com/vuln/360976		vdb-entrytechnical-description
https://vuldb.com/vuln/360976/cti		signaturepermissions-required