{
  "cveId": "CVE-2026-52886",
  "url": "https://patchblox.com/security/cve/CVE-2026-52886",
  "summary": "CVE-2026-52886 is fixed in Notepad\u002B\u002B on 1 platform by Notepad\u002B\u002B 8.9.7 (version 8.9.7), released July 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Notepad\u002B\u002B: session.xml backupFilePath starts_with Bypass",
  "description": "Notepad\u002B\u002B is a free and open-source source code editor. Prior to 8.9.7, Notepad\u002B\u002B validates the backupFilePath attribute from session.xml with std::wstring::starts_with against the expected backup directory without path normalization, allowing parent-directory sequences during snapshot-mode restoration to read an arbitrary user-readable file outside the backup directory into an editor tab. This issue is fixed in version 8.9.7.",
  "published": "2026-08-17T20:16:44Z",
  "severity": "",
  "cvss": 5.1,
  "cwe": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
  "epss": 0.00165,
  "epssPercentile": 0.05802,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2026-52886",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Notepad\u002B\u002B",
      "fixedVersion": "8.9.7",
      "fix": "Notepad\u002B\u002B 8.9.7",
      "url": "https://patchblox.com/security/fix/windows-app/notepad-.notepad-8.9.7",
      "released": "2026-07-14T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}