{
  "cveId": "CVE-2026-33555",
  "url": "https://patchblox.com/security/cve/CVE-2026-33555",
  "summary": "CVE-2026-33555 is fixed in 2 products on 1 platform, first by haproxy 2.8.16-0ubuntu0.24.04.2, released April 13, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "haproxy: An issue was discovered in HAProxy before 3.3.6",
  "description": "An issue was discovered in HAProxy before 3.3.6. The HTTP/3 parser does not check that the received body length matches a previously announced content-length when the stream is closed via a frame with an empty payload. This can cause desynchronization issues with the backend server and could be used for request smuggling. The earliest affected version is 2.6.",
  "published": "2026-04-13T10:16:00Z",
  "severity": "medium",
  "cvss": 5.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
  "epss": 0.00307,
  "epssPercentile": 0.23703,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "haproxy",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "2.6.12-1\u002Bdeb12u4",
      "fix": "DEBIAN-CVE-2026-33555",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-33555",
      "released": "2026-04-13T17:16:28Z"
    },
    {
      "platform": "linux",
      "product": "haproxy",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "3.0.11-1\u002Bdeb13u3",
      "fix": "DEBIAN-CVE-2026-33555",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-33555",
      "released": "2026-04-13T17:16:28Z"
    },
    {
      "platform": "linux",
      "product": "haproxy",
      "release": "Debian 14",
      "fixedVersion": "3.2.15-1",
      "fix": "DEBIAN-CVE-2026-33555",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-33555",
      "released": "2026-04-13T17:16:28Z"
    },
    {
      "platform": "linux",
      "product": "haproxy",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.8.16-0ubuntu0.24.04.2",
      "fix": "haproxy 2.8.16-0ubuntu0.24.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-haproxy-2.8.16-0ubuntu0.24.04.2",
      "released": "2026-04-13T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "haproxy",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "3.0.12-0ubuntu0.25.10.4",
      "fix": "haproxy 3.0.12-0ubuntu0.25.10.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-haproxy-3.0.12-0ubuntu0.25.10.4",
      "released": "2026-04-13T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "haproxy",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.2.9-1ubuntu2.1",
      "fix": "haproxy 3.2.9-1ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-haproxy-3.2.9-1ubuntu2.1",
      "released": "2026-04-13T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "haproxy",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.2.15\u002Bgit64.0fc44b458-160000.2.1",
      "fix": "OPENSUSE-SU-2026:20618-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-20618-1",
      "released": "2026-04-23T08:09:04Z"
    },
    {
      "platform": "linux",
      "product": "haproxy",
      "release": "sles 15.6",
      "fixedVersion": "2.8.11\u002Bgit0.01c1056a4-150600.3.12.1",
      "fix": "SUSE-SU-2026:1568-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1568-1",
      "released": "2026-04-23T12:11:11Z"
    },
    {
      "platform": "linux",
      "product": "haproxy",
      "release": "sles 15.7",
      "fixedVersion": "2.8.11\u002Bgit0.01c1056a4-150600.3.12.1",
      "fix": "SUSE-SU-2026:1568-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1568-1",
      "released": "2026-04-23T12:11:11Z"
    },
    {
      "platform": "linux",
      "product": "vim-haproxy",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.8.16-0ubuntu0.24.04.2",
      "fix": "vim-haproxy 2.8.16-0ubuntu0.24.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-vim-haproxy-2.8.16-0ubuntu0.24.04.2",
      "released": "2026-04-13T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "vim-haproxy",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "3.0.12-0ubuntu0.25.10.4",
      "fix": "vim-haproxy 3.0.12-0ubuntu0.25.10.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-vim-haproxy-3.0.12-0ubuntu0.25.10.4",
      "released": "2026-04-13T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "vim-haproxy",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.2.9-1ubuntu2.1",
      "fix": "vim-haproxy 3.2.9-1ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-vim-haproxy-3.2.9-1ubuntu2.1",
      "released": "2026-04-13T10:16:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}