{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "flaskbb",
        "purl": "pkg:pypi/flaskbb"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "2.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.0",
        "2.0.0.dev0",
        "2.0.1",
        "2.0.2",
        "2.2.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-46556",
    "GHSA-xq32-9g7q-7297"
  ],
  "details": "###Summary\nA Server-Side Request Forgery (SSRF) vulnerability in get_image_info() allows any authenticated user to force the server to send HTTP requests to arbitrary internal endpoints, including cloud metadata services (e.g., AWS 169.254.169.254). This is a blind SSRF with confirmed internal port scanning and internal API triggering capabilities. CVSS 6.5 Medium.\n\n###Details\nIn flaskbb/utils/helpers.py (line 571), the url parameter is passed directly to requests.get(url, stream=True) without any validation of scheme, host, or IP address.\n```\npython# flaskbb/utils/helpers.py:571\ndef get_image_info(url: str):\n    r = requests.get(url, timeout=(3.05, 27), stream=True)\n```\n\nAttack chain:\n\n```\nPOST /user/settings/user-details (avatar URL)\n\u2192 ValidateAvatarURL.validate()    # validators.py:103\n\u2192 check_image(avatar)             # helpers.py:628\n\u2192 get_image_info(url)             # helpers.py:571\n\u2192 requests.get(url)               # No domain/IP restriction\nEntry points:\n\n/user/settings/user-details (any authenticated user)\n/admin/users/\u003cid\u003e/edit (admin only)\n\n```\n\n###PoC\n[submit.zip](https://github.com/user-attachments/files/26301527/submit.zip)\n\nLog in to FlaskBB as any user\nNavigate to Settings \u2192 User Details\nEnter http://169.254.169.254/latest/meta-data/ as the avatar URL\nSubmit the form\nThe server sends a GET request to the internal metadata endpoint\n\nThree exploitation channels confirmed:\n\nServer-side request: Captured on mock metadata server\nInternal port scan: check_image() returns distinct errors (CONN_REFUSED, NO_CONTENT_LENGTH, TYPE_NOT_ALLOWED, SUCCESS) that map internal network topology\nInternal API triggering: Mock APIs on 127.0.0.1:9200 triggered via SSRF (deploy, shutdown, key dump endpoints)\n\n###Impact\nAny authenticated user is impacted. Attackers can force the server to request internal services, cloud metadata endpoints, or private network resources. On cloud deployments (AWS/GCP/Azure), IAM credentials can be leaked. In production, any GET-triggered internal service is reachable: CI/CD webhooks, Elasticsearch, etcd, Consul, etc.",
  "id": "PYSEC-2026-2479",
  "modified": "2026-07-13T16:04:04.660755Z",
  "published": "2026-07-13T15:19:10.820662Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/flaskbb/flaskbb/security/advisories/GHSA-xq32-9g7q-7297"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/flaskbb/flaskbb"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/flaskbb"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-xq32-9g7q-7297"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46556"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "FlaskBB: SSRF in get_image_info() via unrestricted avatar URL"
}