{
  "cveId": "CVE-2026-103262",
  "url": "https://patchblox.com/security/cve/CVE-2026-103262",
  "summary": "CVE-2026-103262 is fixed in 9 products on 1 platform, first by python3-tornado 6.5.4-0.1ubuntu0.2, released October 1, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "python3-tornado: Tornado versions before 6.5.9 contain an unbounded memory accumulation vulnerability in CurlAsyncHTTPClient that allo...",
  "description": "Tornado versions before 6.5.9 contain an unbounded memory accumulation vulnerability in CurlAsyncHTTPClient that allows remote attackers to cause denial of service by sending a compressed response. Attackers can send a gzip-encoded decompression bomb that accumulates in memory without size limits, causing the application process to be killed by out-of-memory conditions.",
  "published": "2026-10-01T04:17:00Z",
  "severity": "Medium",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00628,
  "epssPercentile": 0.5035,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "python-tornado",
      "release": "RHEL 10",
      "fixedVersion": "6.5.10-0.el10_0.1",
      "fix": "RHSA-2026:91583",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-91583",
      "released": "2026-10-13T23:30:48Z"
    },
    {
      "platform": "linux",
      "product": "python-tornado",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.5.3-1ubuntu0.2\u002Besm4",
      "fix": "python-tornado 4.5.3-1ubuntu0.2\u002Besm4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-tornado-4.5.3-1ubuntu0.2-esm4",
      "released": "2026-10-24T13:26:02Z"
    },
    {
      "platform": "linux",
      "product": "python-tornado",
      "release": "rocky 10",
      "fixedVersion": "0:6.5.10-1.el10_2.1",
      "fix": "RLSA-2026:82041",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-82041",
      "released": "2026-11-07T00:39:51Z"
    },
    {
      "platform": "linux",
      "product": "python-tornado",
      "release": "rocky 9",
      "fixedVersion": "0:6.5.10-1.el9_8.1",
      "fix": "RLSA-2026:82040",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-82040",
      "released": "2026-11-07T00:39:57Z"
    },
    {
      "platform": "linux",
      "product": "python-tornado-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "6.1.0-2.amzn2023.0.12",
      "fix": "ALAS2023-2026-3292",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3292",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "python-tornado-doc",
      "release": "amzn 2023",
      "fixedVersion": "6.1.0-2.amzn2023.0.12",
      "fix": "ALAS2023-2026-3292",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3292",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "python3-tornado",
      "release": "RHEL 9",
      "fixedVersion": "0:6.5.10-1.el9_8.1",
      "fix": "RHSA-2026:82040",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-82040",
      "released": "2026-10-13T23:30:48Z"
    },
    {
      "platform": "linux",
      "product": "python3-tornado",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.5.3-1ubuntu0.2\u002Besm4",
      "fix": "python3-tornado 4.5.3-1ubuntu0.2\u002Besm4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python3-tornado-4.5.3-1ubuntu0.2-esm4",
      "released": "2026-10-24T13:26:02Z"
    },
    {
      "platform": "linux",
      "product": "python3-tornado",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "6.4.0-1ubuntu0.6",
      "fix": "python3-tornado 6.4.0-1ubuntu0.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-python3-tornado-6.4.0-1ubuntu0.6",
      "released": "2026-10-24T13:26:11Z"
    },
    {
      "platform": "linux",
      "product": "python3-tornado",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "6.5.4-0.1ubuntu0.2",
      "fix": "python3-tornado 6.5.4-0.1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-python3-tornado-6.5.4-0.1ubuntu0.2",
      "released": "2026-10-01T04:17:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-tornado",
      "release": "almalinux 10",
      "fixedVersion": "6.5.10-1.el10_2.1",
      "fix": "ALSA-2026:82041",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-82041",
      "released": "2026-11-07T00:39:57Z"
    },
    {
      "platform": "linux",
      "product": "python3-tornado",
      "release": "almalinux 9",
      "fixedVersion": "6.5.10-1.el9_8.1",
      "fix": "ALSA-2026:82040",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-82040",
      "released": "2026-11-07T00:40:32Z"
    },
    {
      "platform": "linux",
      "product": "python3-tornado",
      "release": "amzn 2023",
      "fixedVersion": "6.1.0-2.amzn2023.0.12",
      "fix": "ALAS2023-2026-3292",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3292",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "python3-tornado",
      "release": "ol 10",
      "fixedVersion": "0:6.5.10-1.el10_2.1",
      "fix": "ELSA-2026-82041",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-82041",
      "released": "2026-11-07T00:59:15Z"
    },
    {
      "platform": "linux",
      "product": "python3-tornado",
      "release": "ol 9",
      "fixedVersion": "0:6.5.10-1.el9_8.1",
      "fix": "ELSA-2026-82040",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-82040",
      "released": "2026-11-07T00:52:27Z"
    },
    {
      "platform": "linux",
      "product": "python3-tornado-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.0-2.amzn2023.0.12",
      "fix": "ALAS2023-2026-3292",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3292",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "python3.13-tornado",
      "release": "amzn 2023",
      "fixedVersion": "6.4.2-1.amzn2023.0.7",
      "fix": "ALAS2023-2026-3293",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3293",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "python3.13-tornado-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.4.2-1.amzn2023.0.7",
      "fix": "ALAS2023-2026-3293",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3293",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "python3.13-tornado-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "6.4.2-1.amzn2023.0.7",
      "fix": "ALAS2023-2026-3293",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3293",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "python3.13-tornado-doc",
      "release": "amzn 2023",
      "fixedVersion": "6.4.2-1.amzn2023.0.7",
      "fix": "ALAS2023-2026-3293",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3293",
      "released": "2026-11-07T01:06:07Z"
    }
  ],
  "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"
  }
}