{
  "cveId": "CVE-2026-109411",
  "url": "https://patchblox.com/security/cve/CVE-2026-109411",
  "summary": "CVE-2026-109411 is fixed in samba on 1 platform by DEBIAN-CVE-2026-109411 (version 2:4.25.1\u002Bdfsg-1), released October 27, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "samba: An access control bypass flaw was identified in Samba\u0027s vfs_ceph_rgw module in it\u0027s openat() function",
  "description": "An access control bypass flaw was identified in Samba\u0027s vfs_ceph_rgw module in it\u0027s openat() function. An authenticated user can bypass access controls to read or overwrite restricted files on shares configured with the experimental vfs_ceph_rgw module. When a client requests an existing file using mismatched character casing, the module fails to perform a case-insensitive lookup correctly, causing the server to treat the operation as creating a new file. As a result, the server skips standard permission checks on the existing file, allowing the attacker to access or overwrite sensitive data owned by other users.",
  "published": "2026-10-28T20:17:17Z",
  "severity": "high",
  "cvss": 8.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
  "epss": 0.00649,
  "epssPercentile": 0.51417,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "samba",
      "release": "Debian 14",
      "fixedVersion": "2:4.25.1\u002Bdfsg-1",
      "fix": "DEBIAN-CVE-2026-109411",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-109411",
      "released": "2026-10-27T21:14:52Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T07:50:38Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}