{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.0"
              },
              {
                "last_affected": "2.0"
              },
              {
                "introduced": "2.1"
              },
              {
                "last_affected": "2.1"
              },
              {
                "introduced": "2.2"
              },
              {
                "last_affected": "2.2"
              },
              {
                "introduced": "2.3"
              },
              {
                "last_affected": "2.3"
              },
              {
                "introduced": "2.4"
              },
              {
                "last_affected": "2.4"
              },
              {
                "introduced": "2.7"
              },
              {
                "last_affected": "2.7"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "23c57b84b893f585908c95a1d7d94a8e5b484445"
            },
            {
              "fixed": "ddd683a35f8aaac2b7b9884a24cd53bddfc65238"
            }
          ],
          "repo": "https://github.com/open5gs/open5gs",
          "type": "GIT"
        }
      ],
      "versions": [
        "2.0",
        "2.1",
        "2.2",
        "2.3",
        "2.4",
        "2.7"
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulDB",
    "cwe_ids": [
      "CWE-119",
      "CWE-416"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90707.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "2.5"
          },
          {
            "last_affected": "2.5"
          },
          {
            "introduced": "2.6"
          },
          {
            "last_affected": "2.6"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "A security flaw has been discovered in Open5GS up to 2.7.x. Affected is the function amf_nnrf_try_old_amf_discovery_fallback of the file src/amf/nnrf-handler.c of the component Old AMF Discovery Fallback. The manipulation of the argument discovery_option results in use after free. The attack may be performed from remote. The patch is identified as ddd683a35f8aaac2b7b9884a24cd53bddfc65238. Applying a patch is advised to resolve this issue.",
  "id": "CVE-2026-90707",
  "modified": "2026-09-17T03:31:06.851774045Z",
  "published": "2026-09-14T10:45:08.438Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/open5gs/open5gs/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90707.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90707"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/cve/CVE-2026-90707"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/submit/918267"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/vuln/403249"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/vuln/403249/cti"
    },
    {
      "type": "FIX",
      "url": "https://github.com/open5gs/open5gs/commit/ddd683a35f8aaac2b7b9884a24cd53bddfc65238"
    },
    {
      "type": "FIX",
      "url": "https://github.com/open5gs/open5gs/pull/4698"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:X",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Open5GS Old AMF Discovery Fallback nnrf-handler.c amf_nnrf_try_old_amf_discovery_fallback use after free"
}