{
  "cveId": "CVE-2026-45309",
  "url": "https://patchblox.com/security/cve/CVE-2026-45309",
  "summary": "CVE-2026-45309 is fixed in python-asyncssh on 1 platform by DEBIAN-CVE-2026-45309 (version 2.23.0-1), released July 10, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "python-asyncssh: AsyncSSH is a Python package which provides an asynchronous client and server implementation of the SSHv2 protocol on...",
  "description": "AsyncSSH is a Python package which provides an asynchronous client and server implementation of the SSHv2 protocol on top of the Python asyncio framework. Prior to 2.23.0, AsyncSSH expands the OpenSSH-compatible AuthorizedKeysFile %u token in asyncssh/config.py, asyncssh/connection.py, asyncssh/auth_keys.py, and asyncssh/misc.py with the raw SSH username during pre-authentication server config reload, allowing a server configured with AuthorizedKeysFile authorized_keys/%u to read an authorized-keys file outside the intended directory when the SSH username contains /, \\, or .. path traversal segments and authenticate with an attacker-selected key file. This issue is fixed in version 2.23.0.",
  "published": "2026-07-17T19:17:14Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
  "epss": 0.00592,
  "epssPercentile": 0.48541,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "python-asyncssh",
      "release": "Debian 14",
      "fixedVersion": "2.23.0-1",
      "fix": "DEBIAN-CVE-2026-45309",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-45309",
      "released": "2026-07-10T15:54:09Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}