GHSA-Q7C8-GFJH-8V4P

Vulnerability from github – Published: 2026-01-23 18:31 – Updated: 2026-06-05 18:09
VLAI
Summary
Free5gc NRF is vulnerable to scope validation bypass via maliciously crafted targetNF value
Details

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.

Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/free5gc/nrf"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-66719"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-05T18:09:13Z",
    "nvd_published_at": "2026-01-23T16:15:51Z",
    "severity": "CRITICAL"
  },
  "details": "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.",
  "id": "GHSA-q7c8-gfjh-8v4p",
  "modified": "2026-06-05T18:09:13Z",
  "published": "2026-01-23T18:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-66719"
    },
    {
      "type": "WEB",
      "url": "https://github.com/free5gc/free5gc/issues/733"
    },
    {
      "type": "WEB",
      "url": "https://github.com/free5gc/free5gc/issues/736"
    },
    {
      "type": "WEB",
      "url": "https://github.com/free5gc/nrf/pull/73"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/free5gc/nrf"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Free5gc NRF is vulnerable to scope validation bypass via maliciously crafted targetNF value"
}


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