{
  "cveId": "CVE-2026-34829",
  "url": "https://patchblox.com/security/cve/CVE-2026-34829",
  "summary": "CVE-2026-34829 is fixed in 2 products on 1 platform, first by ruby-rack 3.2.4-1ubuntu1.1, released April 2, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "ruby-rack: Rack is a modular Ruby web server interface",
  "description": "Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Multipart::Parser only wraps the request body in a BoundedIO when CONTENT_LENGTH is present. When a multipart/form-data request is sent without a Content-Length header, such as with HTTP chunked transfer encoding, multipart parsing continues until end-of-stream with no total size limit. For file parts, the uploaded body is written directly to a temporary file on disk rather than being constrained by the buffered in-memory upload limit. An unauthenticated attacker can therefore stream an arbitrarily large multipart file upload and consume unbounded disk space. This results in a denial of service condition for Rack applications that accept multipart form data. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.",
  "published": "2026-04-02T10:16:00Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00375,
  "epssPercentile": 0.31734,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "rmt-server",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.1.0-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21640-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21640-1",
      "released": "2026-08-25T06:34:56Z"
    },
    {
      "platform": "linux",
      "product": "rmt-server",
      "release": "sles 15.6",
      "fixedVersion": "2.27-150500.3.47.1",
      "fix": "SUSE-SU-2026:2487-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2487-1",
      "released": "2026-06-22T12:08:31Z"
    },
    {
      "platform": "linux",
      "product": "rmt-server",
      "release": "sles 16.0",
      "fixedVersion": "3.1.0-160000.1.1",
      "fix": "SUSE-SU-2026:23321-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-23321-1",
      "released": "2026-08-25T06:34:19Z"
    },
    {
      "platform": "linux",
      "product": "ruby-rack",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "2.2.22-0\u002Bdeb12u2",
      "fix": "DEBIAN-CVE-2026-34829",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-34829",
      "released": "2026-04-02T17:16:26Z"
    },
    {
      "platform": "linux",
      "product": "ruby-rack",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "3.1.20-0\u002Bdeb13u2",
      "fix": "DEBIAN-CVE-2026-34829",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-34829",
      "released": "2026-04-02T17:16:26Z"
    },
    {
      "platform": "linux",
      "product": "ruby-rack",
      "release": "Debian 14",
      "fixedVersion": "3.2.6-2",
      "fix": "DEBIAN-CVE-2026-34829",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-34829",
      "released": "2026-04-02T17:16:26Z"
    },
    {
      "platform": "linux",
      "product": "ruby-rack",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.1.4-5ubuntu1.2\u002Besm3",
      "fix": "ruby-rack 2.1.4-5ubuntu1.2\u002Besm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-ruby-rack-2.1.4-5ubuntu1.2-esm3",
      "released": "2026-04-30T14:06:06Z"
    },
    {
      "platform": "linux",
      "product": "ruby-rack",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.2.7-1ubuntu0.7",
      "fix": "ruby-rack 2.2.7-1ubuntu0.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-ruby-rack-2.2.7-1ubuntu0.7",
      "released": "2026-04-30T14:06:10Z"
    },
    {
      "platform": "linux",
      "product": "ruby-rack",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "3.1.16-0.1ubuntu0.3",
      "fix": "ruby-rack 3.1.16-0.1ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-ruby-rack-3.1.16-0.1ubuntu0.3",
      "released": "2026-04-30T14:06:15Z"
    },
    {
      "platform": "linux",
      "product": "ruby-rack",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.2.4-1ubuntu1.1",
      "fix": "ruby-rack 3.2.4-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-ruby-rack-3.2.4-1ubuntu1.1",
      "released": "2026-04-02T11:16:00Z"
    }
  ],
  "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"
  }
}