{
  "cveId": "CVE-2026-47737",
  "url": "https://patchblox.com/security/cve/CVE-2026-47737",
  "summary": "CVE-2026-47737 is fixed in puma on 1 platform, first by DEBIAN-CVE-2026-47737, released July 18, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "puma: Puma is a Ruby/Rack web server built for parallelism",
  "description": "Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, Puma is vulnerable to source IP spoofing when set_remote_address proxy_protocol: :v1 is enabled and persistent connections are used because Puma incorrectly re-parses PROXY protocol headers after each keep-alive request on the same connection, allowing an attacker to inject a second PROXY header and overwrite REMOTE_ADDR. This issue is fixed in versions 7.2.1 and 8.0.2.",
  "published": "2026-07-14T20:17:03Z",
  "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": 0.00177,
  "epssPercentile": 0.07346,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "puma",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.6.5-3\u002Bdeb12u2",
      "fix": "DEBIAN-CVE-2026-47737",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-47737",
      "released": "2026-07-18T12:42:52Z"
    },
    {
      "platform": "linux",
      "product": "puma",
      "release": "Debian 14",
      "fixedVersion": "8.0.2-1",
      "fix": "DEBIAN-CVE-2026-47737",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-47737",
      "released": "2026-07-18T12:42:52Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}