{
  "cveId": "CVE-2026-70455",
  "url": "https://patchblox.com/security/cve/CVE-2026-70455",
  "summary": "CVE-2026-70455 is fixed in 3 products on 1 platform, first by RHSA-2026:67463, released August 13, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "rsync 3.4.2 \u003C 3.5.0 DoS via --zt Zstandard Compression Thread Exhaustion",
  "description": "rsync 3.4.2 before 3.5.0\u00A0contains a denial of service vulnerability that allows a remote sender to exhaust system resources by specifying the --zt short alias for --compress-threads, which bypasses the refuse options directive\u0027s string matching on long option names. Attackers can specify --zt=N with a large value to spawn an unbounded number of Zstandard worker threads on the receiver, exhausting available thread and memory resources.",
  "published": "2026-08-13T14:45:11Z",
  "severity": "Important",
  "cvss": 8.2,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
  "cwe": "Allocation of Resources Without Limits or Throttling",
  "epss": 0.00566,
  "epssPercentile": 0.47234,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70455",
  "fixes": [
    {
      "platform": "linux",
      "product": "rsync",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "3.5.0\u002Bds1-0\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-70455",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-70455",
      "released": "2026-08-27T00:27:02Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "Debian 14",
      "fixedVersion": "3.5.0\u002Bds1-1",
      "fix": "DEBIAN-CVE-2026-70455",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-70455",
      "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": "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": "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": "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": "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": "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": "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": "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": "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"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}