{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "3.11.0"
              },
              {
                "fixed": "3.11.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "021f99e0beb2842bd8ea9d434d93ea50bb9e4aa4"
            }
          ],
          "repo": "https://github.com/bluewave-labs/checkmate",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85390.json"
  },
  "details": "Checkmate through 3.11.0 omits the isAllowed role guard middleware on maintenance-window, notification, and check-deletion routes, allowing read-only users to perform administrative actions. Attackers with user-role sessions can create arbitrary maintenance windows to silence alerts, modify notification channels, and delete monitor check history to erase incident evidence.",
  "id": "CVE-2026-85390",
  "modified": "2026-09-05T03:30:21.971321614Z",
  "published": "2026-09-03T18:54:23.866Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85390.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-85390"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/checkmate-through-3.11.0-missing-authorization-on-maintenance-window-notification-and-check-deletion-routes"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/bluewave-labs/Checkmate/issues/3916"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/bluewave-labs/Checkmate"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/bluewave-labs/Checkmate/blob/v3.11.0/server/src/api/routes/checkRoutes.ts"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/bluewave-labs/Checkmate/blob/v3.11.0/server/src/api/routes/maintenanceWindowRoutes.ts"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/bluewave-labs/Checkmate/blob/v3.11.0/server/src/api/routes/notificationRoutes.ts"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Checkmate through 3.11.0 Missing Authorization on Maintenance Window, Notification, and Check Deletion Routes"
}