{
  "cveId": "CVE-2026-44507",
  "url": "https://patchblox.com/security/cve/CVE-2026-44507",
  "summary": "CVE-2026-44507 is fixed in rsync on 1 platform, first by DEBIAN-CVE-2026-44507, released July 21, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "rsync: Rsync is a file-copying tool that uses a delta-transfer algorithm to synchronize remote and local files",
  "description": "Rsync is a file-copying tool that uses a delta-transfer algorithm to synchronize remote and local files.  In versions prior to 3.4.3, when using a daemon configured with a chroot, the reverse DNS lookup of the connecting client was performed after the chroot had been entered. If the chroot did not contain the files glibc needs for resolution (/etc/resolv.conf, /etc/nsswitch.conf, /etc/hosts, NSS service modules), the lookup failed and the connecting hostname was set to \u0022UNKNOWN\u0022. Hostname-based deny rules (\u0022hosts deny = *.evil.example\u0022) therefore could not match, and an attacker who controlled the PTR record for their source IP could connect from a hostname that the administrator had intended to deny. IP-based ACLs (\u0022hosts allow = 10.0.0.0/8\u0022) are unaffected. This issue is fixed in version 3.4.3.",
  "published": "2026-07-20T21:16:46Z",
  "severity": "medium",
  "cvss": 4.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "rsync",
      "release": "Debian 14",
      "fixedVersion": "3.4.3\u002Bds1-1",
      "fix": "DEBIAN-CVE-2026-44507",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-44507",
      "released": "2026-07-21T13:06:52Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.4.1-160000.6.1",
      "fix": "OPENSUSE-SU-2026:21650-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21650-1",
      "released": "2026-08-26T12:30:55Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "sles 16.0",
      "fixedVersion": "3.4.1-160000.6.1",
      "fix": "SUSE-SU-2026:23323-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-23323-1",
      "released": "2026-08-26T12:30:35Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}