---
id: CVE-2026-8251
title: A vulnerability was found in Open5GS up to 2.7.7
summary: >-
  A vulnerability was found in Open5GS up to 2.7.7. This impacts the function
  update_authorized_pcc_rule_and_qos of the file /src/smf/npcf-handler.c of the
  component SMF. Performing a manipulation results in denial of service. The
  attack i…
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-2026-8251'
references:
  - url: 'https://github.com/open5gs/open5gs/'
    label: cna@vuldb.com
  - url: 'https://github.com/open5gs/open5gs/issues/4445'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/808480'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/362548'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/362548/cti'
    label: cna@vuldb.com
tags:
  - nvd
epss: 0.00676
epssPercentile: 0.50079
ingestedAt: '2026-07-24T07:21:21.610Z'
---

## Overview

A vulnerability was found in Open5GS up to 2.7.7. This impacts the function update_authorized_pcc_rule_and_qos of the file /src/smf/npcf-handler.c of the component SMF. Performing a manipulation results in denial of service. The attack is possible to be carried out 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.

## Affected

- `open5gs <= 2.7.7`

## Remediation

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