SiYuan before v3.8.7 Path Traversal Local File Read via MCP Asset Tool

{
  "id": "672084489a77fecfe33e8c5db0d3304bd961c94be66a0be8d5367f1ef86071db",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-116168",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "SiYuan before v3.8.7 Path Traversal Local File Read via MCP Asset Tool",
    "summary": "SiYuan before 3.8.7 contains a path traversal vulnerability in the MCP asset tool because validateAssetUploadPaths relies on an incomplete sensitive-path blacklist that omits .env and other secret files. Authenticated attackers driving the MCP asset upload action can copy such local files into the workspace and read them back via /assets/ over HTTP.",
    "evidence": "cve:CVE-2026-116168",
    "products": [
      {
        "name": {
          "value": "siyuan",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-116168",
      "aliases": [
        "CVE-2026-116168"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "Safety": "NOT_DEFINED",
            "version": "4.0",
            "Recovery": "NOT_DEFINED",
            "baseScore": 6.9,
            "Automatable": "NOT_DEFINED",
            "attackVector": "LOCAL",
            "baseSeverity": "MEDIUM",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
            "exploitMaturity": "NOT_DEFINED",
            "providerUrgency": "NOT_DEFINED",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "privilegesRequired": "NONE",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          }
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 6.2,
            "attackVector": "LOCAL",
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "integrityImpact": "NONE",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "availabilityImpact": "NONE",
            "privilegesRequired": "NONE",
            "confidentialityImpact": "HIGH"
          }
        }
      ],
      "affected": [
        {
          "vendor": "siyuan-note",
          "product": "siyuan",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "3.8.7",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "3.8.7",
              "versionType": "semver"
            }
          ],
          "packageURL": "pkg:golang/github.com/siyuan-note/siyuan/kernel",
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-25T14:27:41.242Z",
      "provider": "cve",
      "references": [
        "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-q768-4j87-gf3w",
        "https://www.vulncheck.com/advisories/siyuan-before-3.8.7-path-traversal-local-file-read-via-mcp-asset-tool"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
          "shortName": "VulnCheck",
          "dateUpdated": "2026-10-25T14:27:41.242Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-116168",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 154817,
  "published_at": "2026-10-25T13:20:11.054+00:00"
}