OpenClaw Dashboard v3.0.0 Stored XSS via Failed Login Username Field

{
  "id": "3926af00f682c3c1d33241cf4b58359f299b529d895150c86cee790af301d261",
  "url": "https://osv.dev/vulnerability/CVE-2026-66418",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OpenClaw Dashboard v3.0.0 Stored XSS via Failed Login Username Field",
    "summary": "OpenClaw Dashboard v3.0.0 contains a stored cross-site scripting vulnerability that allows unauthenticated remote attackers to inject arbitrary HTML and script payloads by submitting a crafted username in a failed login POST request, which is recorded verbatim in the audit log. When an administrator opens the notification panel, the unescaped log entry is rendered via innerHTML with a permissive Content-Security-Policy allowing inline event handlers, enabling the attacker-supplied payload to execute in the administrator's session and interact with authenticated endpoints including agent instruction file editing and configuration changes.",
    "evidence": "osv:CVE-2026-66418",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-66418",
      "aliases": [
        "CVE-2026-66418"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tugcantopaloglu/openclaw-dashboard",
              "type": "GIT",
              "events": [
                {
                  "introduced": "b08c0b7cd4f6172c5824dff4e643b0b7950ca603"
                },
                {
                  "last_affected": "b08c0b7cd4f6172c5824dff4e643b0b7950ca603"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "3.0.0"
                      },
                      {
                        "last_affected": "3.0.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "cpe": "cpe:2.3:a:tugcantopaloglu:openclaw_agent_dashboard:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "3.0.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.0.0",
            "v3.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66418.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.852409229Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66418.json",
        "https://github.com/theopaid/Unauthenticated-Stored-Cross-Site-Scripting-Leading-To-Administrator-Account-Takeover",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-66418",
        "https://www.vulncheck.com/advisories/openclaw-dashboard-stored-xss-via-failed-login-username-field",
        "https://github.com/tugcantopaloglu/openclaw-dashboard"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66418.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-66418",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506356,
  "published_at": "2026-07-30T20:55:24.766+00:00"
}