{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "9.31"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "fc92b342ceedcf38dbd614a0f7b50d6dc2b22eb8"
            },
            {
              "fixed": "d3366ca7cde7b9c3499f7ced325fdb623da38435"
            }
          ],
          "repo": "https://github.com/wekan/wekan",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-g6vm-7757-pr88"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-22",
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52890.json"
  },
  "details": "Wekan is open source kanban built with Meteor. Prior to 9.31, Wekan allows a logged-in board member to insert an attachment document through the /attachments/insert DDP method with attacker-controlled versions.original.path and versions.original.storage fields. The server/permissions/attachments.js insert rule checks only board write access, and FileStoreStrategyFilesystem.getReadStream() in models/lib/fileStoreStrategy.js streams the stored path without a storage-root containment check, allowing arbitrary file reads and denial of service through special files such as /dev/zero. This issue is fixed in version 9.31.",
  "id": "CVE-2026-52890",
  "modified": "2026-07-18T03:42:03.852682342Z",
  "published": "2026-07-15T21:07:16.921Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/wekan/wekan/releases/tag/v9.31"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52890.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/wekan/wekan/security/advisories/GHSA-g6vm-7757-pr88"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52890"
    },
    {
      "type": "FIX",
      "url": "https://github.com/wekan/wekan/commit/fc92b342ceedcf38dbd614a0f7b50d6dc2b22eb8"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Wekan: Arbitrary file read and server DoS via attachment versions.original.path"
}