Open5GS Authentication Subscription DoS Vulnerability

Publication date: 2026-05-04

Last updated on: 2026-05-04

Assigner: VulDB

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.

CVSS Scores

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Meta Information

Published

2026-05-04

Last Modified

2026-05-04

Generated

2026-07-06

AI Q&A

2026-05-05

EPSS Evaluated

2026-07-04

NVD

CVE-2026-7779

Affected Vendors & Products

Vendor	Product	Version / Range
open5gs	open5gs	to 2.7.7 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-404	The product does not release or incorrectly releases a resource before it is made available for re-use.

Attack-Flow Graph

Executive Summary

This vulnerability is a security flaw in Open5GS up to version 2.7.7, specifically in the function udm_nudr_dr_handle_subscription_authentication within the authentication-subscription Endpoint component. It allows an attacker to perform a manipulation that results in a denial of service (DoS). The attack can be executed remotely, and the exploit code has been publicly released.

Impact Analysis

The primary impact of this vulnerability is a denial of service condition, which means that an attacker can disrupt the normal operation of the affected Open5GS component remotely. This could lead to service outages or degraded performance in systems relying on Open5GS for authentication-subscription services.

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