CVE-2026-100637

{
  "etk_id": "ETK-2026-265",
  "cve_id": "CVE-2026-100637",
  "display_id": "CVE-2026-100637",
  "ghsa_id": "GHSA-4fq5-2r2r-5cw9",
  "euvd_id": "EUVD-2026-87731",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Path traversal in SiYuan checkoutRepo",
  "summary": "SiYuan versions before v3.8.4 allow an authenticated administrator to use the checkoutRepo endpoint to write or overwrite JSON files outside the workspace. Exploitation requires administrator access and a pre-existing directory writable by the SiYuan kernel process.",
  "mitigation": "Upgrade SiYuan to v3.8.4 or later. Restrict administrator API access until the update is applied.",
  "vendor": "go",
  "product": "go:github.com/siyuan-note/siyuan",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 3.8.3"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "v3.8.4"
      ],
      "package_name": "github.com/siyuan-note/siyuan",
      "purl": "pkg:golang/github.com/siyuan-note/siyuan"
    }
  ],
  "cwes": [
    22
  ],
  "cvss_score": 7.6,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L",
  "epss_score": 0.0047,
  "epss_percentile": 0.3968,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 14.176090516666667,
  "t0_at": "2026-09-26T13:23:11.226000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-01T18:20:17.034557+00:00",
      "days": 5.206317228668982,
      "is_lower_bound": false,
      "measured_at": "2026-09-26T13:23:11.226000+00:00",
      "url": null
    },
    "public_poc": {
      "at": "2026-09-10T14:45:57+00:00",
      "days": -15.94252576388889,
      "is_lower_bound": false,
      "measured_at": "2026-09-26T13:23:11.226000+00:00",
      "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jhmh-hr4g-c5g2"
    },
    "trigger_signal": {
      "at": "2026-09-26T13:23:11.226000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-26T13:23:11.226000+00:00",
      "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jhmh-hr4g-c5g2"
    }
  }
}