whiteboard — security advisory

{
  "id": "bb4c49c6dd4f953d944c721779f3ee67cc297427c69ec0aaeb1a16f89fc5a9e5",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-87897",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-87897",
    "summary": "A SSRF vulnerability found that enables access to internal Chrome Devtools Protocol APIs that can leak the JWT authentication token for another user. A low privileged attacker could continually exploit this vulnerability to leak the JWT authentication token for another user when they start a recording, which then enables the attacker read/write access to the victim's Whiteboard.",
    "evidence": "cve:CVE-2026-87897",
    "products": [
      {
        "name": {
          "value": "whiteboard",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-87897",
      "aliases": [
        "CVE-2026-87897"
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "version": "3.0",
            "baseScore": 4.6,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N"
          }
        }
      ],
      "affected": [
        {
          "vendor": "Nextcloud",
          "product": "whiteboard",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.0",
              "lessThan": "1.0.0",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-27T16:15:34.742Z",
      "provider": "cve",
      "references": [
        "https://hackerone.com/reports/3576823"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
          "shortName": "hackerone",
          "dateUpdated": "2026-10-27T16:15:34.742Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-87897",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 394462,
  "published_at": "2026-10-27T16:15:34.742+00:00"
}