Craft CMS - Multiple Stored Cross-Site Scripting in Settings Names and Field Options

{
  "id": "7ee0237b5c72b726b10b0fd5a1d6f8981ab1593b342c8d894784fc729a46c1a5",
  "url": "https://osv.dev/vulnerability/CVE-2026-56393",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Craft CMS - Multiple Stored Cross-Site Scripting in Settings Names and Field Options",
    "summary": "Craft CMS 4.x (>= 4.0.0-RC1, < 4.17.0-beta.1) and 5.x (>= 5.0.0-RC1, < 5.9.0-beta.1) contain multiple stored cross-site scripting vulnerabilities where settings names and field option labels are rendered without sanitization (e.g., via the checkbox.twig template, which used {{ label|raw }}). An authenticated administrator (with allowAdminChanges enabled) can inject malicious payloads into section names, volume names, user group names, global set names, generated field names, checkbox/radio option labels, and custom source labels, causing arbitrary JavaScript to execute in other users' control-panel sessions. Fixed in 4.17.0-beta.1 and 5.9.0-beta.1.",
    "evidence": "osv:CVE-2026-56393",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-56393",
      "aliases": [
        "CVE-2026-56393",
        "GHSA-4mgv-366x-qxvx"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/craftcms/cms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "04755d93f86d07cc183db47db8a0eee106892e30"
                },
                {
                  "fixed": "0ad14c3c7e590461b52aeb44859659e2e231e04d"
                },
                {
                  "introduced": "daac7c1da2f701f2e9ddee1da1457ce61660b581"
                },
                {
                  "fixed": "42cef196d68dd8d48ceaab89b2c9e2edd2cecbe8"
                },
                {
                  "fixed": "943152d2246b36f12adf161a03b8695b773d9276"
                },
                {
                  "fixed": "67780a778c6ec04e68e64a0b1177c168306144a2"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "5.0.0-RC1"
                      },
                      {
                        "fixed": "5.9.0-beta.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "4.0.0-RC1"
                      },
                      {
                        "fixed": "4.17.0-beta.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "943152d2246b36f12adf161a03b8695b773d9276"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "67780a778c6ec04e68e64a0b1177c168306144a2"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56393.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:22.253313542Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56393.json",
        "https://github.com/craftcms/cms/security/advisories/GHSA-4mgv-366x-qxvx",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-56393",
        "https://www.vulncheck.com/advisories/craft-cms-multiple-stored-cross-site-scripting-in-settings-names-and-field-options",
        "https://github.com/craftcms/cms/commit/67780a778c6ec04e68e64a0b1177c168306144a2",
        "https://github.com/craftcms/cms/commit/943152d2246b36f12adf161a03b8695b773d9276"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56393.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-56393",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 488742,
  "published_at": "2026-06-21T13:27:01.755+00:00"
}