Wekan: Broken access control in the Excel-export route (`/api/boards/:boardId/exportExcel`)

{
  "id": "1e0d179657114bc848e291e631f54755354472ecf477015b8fd193e589e87243",
  "url": "https://osv.dev/vulnerability/CVE-2026-68559",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Wekan: Broken access control in the Excel-export route (`/api/boards/:boardId/exportExcel`)",
    "summary": "Wekan is open source kanban built with Meteor. From 9.57 until 9.74, the /api/boards/:boardId/exportExcel route in models/exportExcel.js called the asynchronous exporterExcel.canExport(user) authorization guard from models/server/ExporterExcel.js without awaiting it. The returned Promise was always truthy, so exporterExcel.build(res) ran even when board.isVisibleBy(user) would deny access, allowing any authenticated non-member to download private board card titles, descriptions, lists, swimlanes, members, and metadata. This issue is fixed in version 9.74.",
    "evidence": "osv:CVE-2026-68559",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-68559",
      "aliases": [
        "CVE-2026-68559",
        "GHSA-mwq8-ccpm-r533"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wekan/wekan",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a35e5dc12ce38325eafb75a95db20af2df5bb4fe"
                },
                {
                  "fixed": "ca9bcfa4eeaf6293737f038381f4a3e91569f851"
                },
                {
                  "fixed": "7bbd1a3fad5d868fd01d79b5908913e215698e8e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "9.57"
                      },
                      {
                        "fixed": "9.74"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "7bbd1a3fad5d868fd01d79b5908913e215698e8e"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "ca9bcfa4eeaf6293737f038381f4a3e91569f851"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v9.74"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v9.73",
            "v9.72",
            "v9.71",
            "v9.70",
            "v9.69",
            "v9.68",
            "v9.67",
            "v9.65",
            "v9.64",
            "v9.63",
            "v9.62",
            "v9.61",
            "v9.60",
            "v9.59",
            "v9.57"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68559.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.506274026Z",
      "provider": "osv",
      "references": [
        "https://github.com/wekan/wekan/releases/tag/v9.74",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68559.json",
        "https://github.com/wekan/wekan/security/advisories/GHSA-mwq8-ccpm-r533",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-68559",
        "https://github.com/wekan/wekan/commit/7bbd1a3fad5d868fd01d79b5908913e215698e8e"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-639"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68559.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-68559",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491997,
  "published_at": "2026-08-19T19:20:32.15+00:00"
}