---
id: CVE-2026-8250
title: A vulnerability has been found in Open5GS up to 2.7.7
summary: >-
  A vulnerability has been found in Open5GS up to 2.7.7. This affects the
  function smf_n4_build_qos_flow_to_modify_list of the file /src/smf/n4-build.c
  of the component SMF. Such manipulation leads to denial of service. The attack
  can be e…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-404
vendor: open5gs
product: open5gs
affected:
  - open5gs <= 2.7.7
published: '2026-05-10'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-8250'
references:
  - url: 'https://github.com/open5gs/open5gs/'
    label: cna@vuldb.com
  - url: 'https://github.com/open5gs/open5gs/issues/4444'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/808476'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/362547'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/362547/cti'
    label: cna@vuldb.com
tags:
  - nvd
epss: 0.00372
epssPercentile: 0.31149
ingestedAt: '2026-07-24T07:21:21.587Z'
---

## Overview

A vulnerability has been found in Open5GS up to 2.7.7. This affects the function smf_n4_build_qos_flow_to_modify_list of the file /src/smf/n4-build.c of the component SMF. Such manipulation leads to denial of service. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

## Affected

- `open5gs <= 2.7.7`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.