MediaFlow Proxy through 2.4.9 Server-Side Request Forgery via Incomplete Validation

{
  "id": "76a13f1fe1775df89a1d587f8ba5bff115462ad6bb7ab28376d9c34eb2b6974a",
  "url": "https://osv.dev/vulnerability/CVE-2026-100391",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "MediaFlow Proxy through 2.4.9 Server-Side Request Forgery via Incomplete Validation",
    "summary": "MediaFlow Proxy through 2.4.9 contains a server-side request forgery vulnerability in the /proxy routes due to missing and incomplete destination validation in the d query parameter. Remote attackers can supply arbitrary internal URLs including loopback and cloud metadata endpoints to read full responses from the proxy server.",
    "evidence": "osv:CVE-2026-100391",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-100391",
      "aliases": [
        "CVE-2026-100391"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mhdzumair/mediaflow-proxy",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "99f4af1153d4766420a098a232183cba1efdc560"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.4.9"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "99f4af1153d4766420a098a232183cba1efdc560"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.4.9",
            "2.4.8",
            "2.4.7",
            "2.4.6",
            "2.4.5",
            "2.4.4",
            "2.4.3",
            "2.4.2",
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            "2.3.0",
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            "2.2.4",
            "2.2.3",
            "2.2.1",
            "2.2.0",
            "2.1.9",
            "2.1.8",
            "2.1.7",
            "2.1.6",
            "2.1.5",
            "2.1.4",
            "2.1.3",
            "2.1.2",
            "2.1.1",
            "2.1.0",
            "2.0.3",
            "2.0.2",
            "2.0.1",
            "2.0.0",
            "1.9.9",
            "1.9.8",
            "1.9.7",
            "1.9.6",
            "1.9.5",
            "1.9.4",
            "1.9.3",
            "1.9.2",
            "1.9.1",
            "1.9.0",
            "1.8.0",
            "1.7.5",
            "1.7.4",
            "1.7.3",
            "1.7.1",
            "1.7.0",
            "1.6.0",
            "1.5.1",
            "1.5.0",
            "1.4.2",
            "1.4.1",
            "1.4.0",
            "1.3.0",
            "1.2.0",
            "1.1.0",
            "1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100391.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.272961799Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100391.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100391",
        "https://www.vulncheck.com/advisories/mediaflow-proxy-through-2.4.9-server-side-request-forgery-via-incomplete-validation",
        "https://github.com/mhdzumair/mediaflow-proxy/commit/99f4af1153d4766420a098a232183cba1efdc560",
        "https://github.com/mhdzumair/mediaflow-proxy",
        "https://github.com/mhdzumair/mediaflow-proxy/blob/2.4.9/mediaflow_proxy/routes/proxy.py#L532-L569"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100391.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-100391",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505685,
  "published_at": "2026-09-25T20:13:12.968+00:00"
}