{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.2.52"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1a9a32da1118a095325ecec50d4c0a784dcd46f8"
            },
            {
              "fixed": "564cc30e1e360959572e01e158734d9475c05903"
            }
          ],
          "repo": "https://github.com/kanboard/kanboard",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-639"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58660.json"
  },
  "details": "Kanboard through 1.2.52, fixed in commit 564cc30, BoardAjaxController save() method (used by the kanban board drag-and-drop endpoint) validates the caller's role on the attacker-supplied project_id but never verifies that the supplied task_id actually belongs to that project. Because task identifiers are sequential integers shared across the entire instance, any authenticated user who is a member of at least one project can enumerate and move (corrupt/hide) tasks belonging to any other project on the same instance, including private projects they have no membership or role on.",
  "id": "CVE-2026-58660",
  "modified": "2026-07-17T03:42:00.558729577Z",
  "published": "2026-07-15T17:03:17.834Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58660.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58660"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/kanboard-boardajaxcontroller-missing-ownership-check-via-drag-and-drop"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/kanboard/kanboard/pull/5853"
    },
    {
      "type": "FIX",
      "url": "https://github.com/kanboard/kanboard/commit/564cc30e1e360959572e01e158734d9475c05903"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kanboard/kanboard"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/kanboard/kanboard/issues/5852"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Kanboard BoardAjaxController Missing Ownership Check via Drag-and-Drop"
}