{
  "cveId": "CVE-2026-85396",
  "url": "https://patchblox.com/security/cve/CVE-2026-85396",
  "summary": "CVE-2026-85396 is fixed in ruby-zip on 1 platform by DEBIAN-CVE-2026-85396 (version 3.4.0\u002Bdfsg-1), released September 4, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "rubyzip before 3.4.0 Path Traversal in Zip::Entry#extract via Sibling-Directory Prefix",
  "description": "rubyzip versions before 3.4.0 contain a path traversal vulnerability in Zip::Entry#extract that fails to properly validate extraction paths using prefix comparison without trailing separators. Attackers can craft archive entries with names like ../upload_backup/owned.sh to write files outside the intended extraction directory into sibling paths sharing the destination prefix.",
  "published": "2026-09-03T19:17:31Z",
  "severity": "Important",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
  "cwe": "Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
  "epss": 0.00564,
  "epssPercentile": 0.47137,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85396",
  "fixes": [
    {
      "platform": "linux",
      "product": "ruby-zip",
      "release": "Debian 14",
      "fixedVersion": "3.4.0\u002Bdfsg-1",
      "fix": "DEBIAN-CVE-2026-85396",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-85396",
      "released": "2026-09-04T01:46:23Z"
    }
  ],
  "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"
  }
}