Craft CMS 5.0.0-RC1 before 5.10.6 SSRF via GraphQL asset mutation

{
  "id": "9b9782bbdb8a9ad238813071c1723afedb3edff5a53916691ad80e27a0e8a571",
  "url": "https://osv.dev/vulnerability/CVE-2026-72784",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Craft CMS 5.0.0-RC1 before 5.10.6 SSRF via GraphQL asset mutation",
    "summary": "Craft CMS versions >= 5.0.0-RC1 before 5.10.6 and >= 4.0.0-RC1 before 4.18.2 contain a server-side request forgery vulnerability in the GraphQL saveAsset mutation, which fetches an attacker-supplied URL server-side. The anti-SSRF validation is incomplete: validateIp() does not cover CGNAT (100.64.0.0/10) or NAT64 (64:ff9b::/96) ranges, and the only IP check runs after the request has already been issued. An attacker holding a GraphQL token scoped only to asset-creation permissions can disclose internal HTTP content from CGNAT/NAT64 targets, force outbound GET requests to internal hosts (including RFC1918, loopback, and metadata endpoints), and enumerate internal services.",
    "evidence": "osv:CVE-2026-72784",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-72784",
      "aliases": [
        "CVE-2026-72784",
        "GHSA-2mx8-9ww7-p27x"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/craftcms/cms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "04755d93f86d07cc183db47db8a0eee106892e30"
                },
                {
                  "fixed": "5c055703a13ba3a52bf013d7ba6c0223d6f62ef8"
                },
                {
                  "introduced": "daac7c1da2f701f2e9ddee1da1457ce61660b581"
                },
                {
                  "fixed": "c7ea105e1d2cf043e76e7847d84e5732071a26b4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "5.0.0-RC1"
                      },
                      {
                        "fixed": "5.10.6"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "4.0.0-RC1"
                      },
                      {
                        "fixed": "4.18.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72784.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.951621151Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72784.json",
        "https://github.com/craftcms/cms/security/advisories/GHSA-2mx8-9ww7-p27x",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-72784",
        "https://www.vulncheck.com/advisories/craft-cms-rc1-before-ssrf-via-graphql-asset-mutation"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72784.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-72784",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505400,
  "published_at": "2026-08-11T12:17:18.509+00:00"
}