{
  "cveId": "CVE-2026-53791",
  "url": "https://patchblox.com/security/cve/CVE-2026-53791",
  "summary": "CVE-2026-53791 is fixed in 5 products on 1 platform, first by RHSA-2026:67463, released August 13, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "rsync \u003C 3.5.0 Daemon IP Spoofing via PROXY Protocol Header",
  "description": "rsync daemon before 3.5.0\u00A0contains an IP address spoofing vulnerability that allows unauthenticated remote attackers to bypass IP-based access controls by sending a crafted PROXY protocol header with a forged source address. Attackers who can connect directly to the rsync daemon can inject a spoofed source IP in the PROXY protocol header to circumvent hosts allow/deny rules, gaining unauthorized access that would otherwise be blocked based on their real source address.",
  "published": "2026-08-13T14:38:10Z",
  "severity": "Critical",
  "cvss": 9.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
  "cwe": "Authentication Bypass by Spoofing",
  "epss": 0.00501,
  "epssPercentile": 0.43159,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53791",
  "fixes": [
    {
      "platform": "linux",
      "product": "rsync",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "3.5.0\u002Bds1-0\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-53791",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-53791",
      "released": "2026-08-27T00:27:02Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "Debian 14",
      "fixedVersion": "3.5.0\u002Bds1-1",
      "fix": "DEBIAN-CVE-2026-53791",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-53791",
      "released": "2026-08-27T00:27:02Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "RHEL 10",
      "fixedVersion": "3.5.0-3.el10_2",
      "fix": "RHSA-2026:67463",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-67463",
      "released": "2026-08-13T14:46:50Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "RHEL 9",
      "fixedVersion": "0:3.2.7-1.el9_8",
      "fix": "RHSA-2026:67462",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-67462",
      "released": "2026-09-19T18:32:55Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "almalinux 10",
      "fixedVersion": "3.5.0-3.el10_2",
      "fix": "ALSA-2026:67463",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-67463",
      "released": "2026-09-14T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "almalinux 9",
      "fixedVersion": "3.2.7-1.el9_8",
      "fix": "ALSA-2026:67462",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-67462",
      "released": "2026-09-14T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "amzn 2023",
      "fixedVersion": "3.5.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3131",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3131",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "ol 10",
      "fixedVersion": "0:3.5.0-3.el10_2",
      "fix": "ELSA-2026-67463-0",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-67463-0",
      "released": "2026-09-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "ol 9",
      "fixedVersion": "0:3.2.7-1.el9_8",
      "fix": "ELSA-2026-67462-0",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-67462-0",
      "released": "2026-09-16T00:00:00Z"
    },
    {
      "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": "rocky 10",
      "fixedVersion": "0:3.5.0-3.el10_2",
      "fix": "RLSA-2026:67463",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-67463",
      "released": "2026-09-15T12:08:56Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "rocky 9",
      "fixedVersion": "0:3.2.7-1.el9_8",
      "fix": "RLSA-2026:67462",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-67462",
      "released": "2026-09-15T18:05:37Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "sles 15.6",
      "fixedVersion": "3.2.7-150600.3.24.1",
      "fix": "SUSE-SU-2026:3657-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3657-1",
      "released": "2026-08-20T17:06:16Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "sles 15.7",
      "fixedVersion": "3.2.7-150600.3.24.1",
      "fix": "SUSE-SU-2026:3657-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3657-1",
      "released": "2026-08-20T17:06:16Z"
    },
    {
      "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"
    },
    {
      "platform": "linux",
      "product": "rsync-daemon",
      "release": "RHEL 9",
      "fixedVersion": "0:3.2.7-1.el9_8",
      "fix": "RHSA-2026:67462",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-67462",
      "released": "2026-09-19T18:32:55Z"
    },
    {
      "platform": "linux",
      "product": "rsync-daemon",
      "release": "almalinux 10",
      "fixedVersion": "3.5.0-3.el10_2",
      "fix": "ALSA-2026:67463",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-67463",
      "released": "2026-09-14T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync-daemon",
      "release": "almalinux 9",
      "fixedVersion": "3.2.7-1.el9_8",
      "fix": "ALSA-2026:67462",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-67462",
      "released": "2026-09-14T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync-daemon",
      "release": "amzn 2023",
      "fixedVersion": "3.5.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3131",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3131",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync-daemon",
      "release": "ol 10",
      "fixedVersion": "0:3.5.0-3.el10_2",
      "fix": "ELSA-2026-67463-0",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-67463-0",
      "released": "2026-09-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync-daemon",
      "release": "ol 9",
      "fixedVersion": "0:3.2.7-1.el9_8",
      "fix": "ELSA-2026-67462-0",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-67462-0",
      "released": "2026-09-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "3.5.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3131",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3131",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "3.5.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3131",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3131",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync-rrsync",
      "release": "RHEL 9",
      "fixedVersion": "0:3.2.7-1.el9_8",
      "fix": "RHSA-2026:67462",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-67462",
      "released": "2026-09-19T18:32:55Z"
    },
    {
      "platform": "linux",
      "product": "rsync-rrsync",
      "release": "almalinux 10",
      "fixedVersion": "3.5.0-3.el10_2",
      "fix": "ALSA-2026:67463",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-67463",
      "released": "2026-09-14T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync-rrsync",
      "release": "almalinux 9",
      "fixedVersion": "3.2.7-1.el9_8",
      "fix": "ALSA-2026:67462",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-67462",
      "released": "2026-09-14T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync-rrsync",
      "release": "ol 10",
      "fixedVersion": "0:3.5.0-3.el10_2",
      "fix": "ELSA-2026-67463-0",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-67463-0",
      "released": "2026-09-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync-rrsync",
      "release": "ol 9",
      "fixedVersion": "0:3.2.7-1.el9_8",
      "fix": "ELSA-2026-67462-0",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-67462-0",
      "released": "2026-09-16T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}