{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "30.2.5"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7976c02e1b10b1687c028d82782f9f5d90a885d6"
            }
          ],
          "repo": "https://github.com/jgraph/drawio",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-c76x-r78m-phwx"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-116",
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58504.json"
  },
  "details": "draw.io is a configurable diagramming and whiteboarding application. Prior to version 30.2.5, opening or importing a crafted .drawio file can execute attacker-controlled JavaScript in the draw.io origin when selected cells are processed by TextFormatPanel.addFont() in src/main/webapp/js/grapheditor/Format.js. An HTML sibling cell keeps the formatted-label path enabled while an editable=0 plain-text sibling is excluded from the merged selection style but remains in the iteration set. graph.cellRenderer.getLabelValue() returns that plain-text label without HTML encoding, and mxUtils.canConvertHtmlToSvg() parses it as HTML, bypassing the earlier CVE-2026-46642 remediation. Successful exploitation can expose diagram data, browser storage, non-HttpOnly cookies, and same-origin actions available to the victim. This issue is fixed in version 30.2.5.",
  "id": "CVE-2026-58504",
  "modified": "2026-09-23T03:30:28.466697914Z",
  "published": "2026-09-21T16:15:30.398Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/jgraph/drawio/releases/tag/v30.2.5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58504.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/jgraph/drawio/security/advisories/GHSA-c76x-r78m-phwx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58504"
    },
    {
      "type": "FIX",
      "url": "https://github.com/jgraph/drawio/commit/7976c02e1b10b1687c028d82782f9f5d90a885d6"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "draw.io: Stored XSS on file open via editable=0 sibling cell — patch bypass of CVE-2026-46642"
}