---
id: CVE-2025-66719
aliases:
  - GHSA-q7c8-gfjh-8v4p
  - GO-2026-5570
title: >-
  Free5gc NRF is vulnerable to scope validation bypass via maliciously crafted
  targetNF value
summary: >-
  Free5gc NRF is vulnerable to scope validation bypass via maliciously crafted
  targetNF value
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
vendor: free5gc
product: github.com/free5gc/nrf
ecosystem: go
affected:
  - github.com/free5gc/nrf < 1.4.1
patched:
  - github.com/free5gc/nrf 1.4.1
published: '2026-01-23'
updated: '2026-07-07'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-q7c8-gfjh-8v4p'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-66719'
  - url: 'https://github.com/free5gc/free5gc/issues/733'
  - url: 'https://github.com/free5gc/free5gc/issues/736'
  - url: 'https://github.com/free5gc/nrf/pull/73'
  - url: 'https://github.com/free5gc/nrf'
tags:
  - osv
  - go
epss: 0.00353
epssPercentile: 0.26153
ingestedAt: '2026-07-09T18:56:36.693Z'
---

## Overview

An issue was discovered in Free5gc NRF 1.4.0. In the access-token generation logic of free5GC, the AccessTokenScopeCheck() function in file internal/sbi/processor/access_token.go bypasses all scope validation when the attacker uses a crafted targetNF value. This allows attackers to obtain an access token with any arbitrary scope.

## Affected packages

- `github.com/free5gc/nrf < 1.4.1`

## Remediation

Upgrade to a patched release:

- `github.com/free5gc/nrf 1.4.1`