{
  "cveId": "CVE-2026-91990",
  "url": "https://patchblox.com/security/cve/CVE-2026-91990",
  "summary": "CVE-2026-91990 is fixed in 10 products on 1 platform, first by ALSA-2026:67147, released September 14, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "python3-tornado: Tornado before 6.5.8 contains a memory amplification vulnerability in parse_multipart_form_data that splits multipart...",
  "description": "Tornado before 6.5.8 contains a memory amplification vulnerability in parse_multipart_form_data that splits multipart data before validating the max_parts limit. Attackers can send crafted multipart requests with many parts to create large transient lists, exhausting server memory and causing denial of service.",
  "published": "2026-09-14T00:00:00Z",
  "severity": "Medium",
  "cvss": 7.5,
  "epss": 0.00424,
  "epssPercentile": 0.36933,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "python-tornado",
      "release": "RHEL 10",
      "fixedVersion": "6.5.8-0.el10_0.1",
      "fix": "RHSA-2026:80741",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-80741",
      "released": "2026-09-14T12:58:54Z"
    },
    {
      "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": "sles 15.6",
      "fixedVersion": "4.5.3-150000.3.31.1",
      "fix": "SUSE-SU-2026:4404-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4404-1",
      "released": "2026-09-30T11:54:12Z"
    },
    {
      "platform": "linux",
      "product": "python-tornado",
      "release": "sles 15.7",
      "fixedVersion": "4.5.3-150000.3.31.1",
      "fix": "SUSE-SU-2026:4404-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4404-1",
      "released": "2026-09-30T11:54:12Z"
    },
    {
      "platform": "linux",
      "product": "python-tornado-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "6.1.0-2.amzn2023.0.11",
      "fix": "ALAS2023-2026-3177",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3177",
      "released": "2026-11-07T01:07:25Z"
    },
    {
      "platform": "linux",
      "product": "python-tornado-doc",
      "release": "amzn 2023",
      "fixedVersion": "6.1.0-2.amzn2023.0.11",
      "fix": "ALAS2023-2026-3177",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3177",
      "released": "2026-11-07T01:07:25Z"
    },
    {
      "platform": "linux",
      "product": "python-tornado6",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.5-160000.7.1",
      "fix": "OPENSUSE-SU-2026:22059-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22059-1",
      "released": "2026-11-07T00:48:28Z"
    },
    {
      "platform": "linux",
      "product": "python-tornado6",
      "release": "sles 15.6",
      "fixedVersion": "6.3.2-150400.9.27.1",
      "fix": "SUSE-SU-2026:4403-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4403-1",
      "released": "2026-09-30T11:52:28Z"
    },
    {
      "platform": "linux",
      "product": "python-tornado6",
      "release": "sles 15.7",
      "fixedVersion": "6.3.2-150400.9.27.1",
      "fix": "SUSE-SU-2026:4403-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4403-1",
      "released": "2026-09-30T11:52:28Z"
    },
    {
      "platform": "linux",
      "product": "python-tornado6",
      "release": "sles 16.0",
      "fixedVersion": "6.5-160000.7.1",
      "fix": "SUSE-SU-2026:24207-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24207-1",
      "released": "2026-11-07T00:45:20Z"
    },
    {
      "platform": "linux",
      "product": "python3-tornado",
      "release": "RHEL 9",
      "fixedVersion": "0:6.5.8-0.el9_8.1",
      "fix": "RHSA-2026:67146",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-67146",
      "released": "2026-09-19T18:32:55Z"
    },
    {
      "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 22.04.1 LTS (jammy)",
      "fixedVersion": "6.1.0-3ubuntu0.1~esm6",
      "fix": "python3-tornado 6.1.0-3ubuntu0.1~esm6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-python3-tornado-6.1.0-3ubuntu0.1-esm6",
      "released": "2026-10-24T13:26:08Z"
    },
    {
      "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": "6.5.8-0.el10_2.1",
      "fix": "ALSA-2026:67147",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-67147",
      "released": "2026-09-14T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-tornado",
      "release": "almalinux 9",
      "fixedVersion": "6.5.8-0.el9_8.1",
      "fix": "ALSA-2026:67146",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-67146",
      "released": "2026-09-14T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-tornado",
      "release": "amzn 2023",
      "fixedVersion": "6.1.0-2.amzn2023.0.11",
      "fix": "ALAS2023-2026-3177",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3177",
      "released": "2026-11-07T01:07:25Z"
    },
    {
      "platform": "linux",
      "product": "python3-tornado-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.0-2.amzn2023.0.11",
      "fix": "ALAS2023-2026-3177",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3177",
      "released": "2026-11-07T01:07:25Z"
    },
    {
      "platform": "linux",
      "product": "python3.13-tornado",
      "release": "amzn 2023",
      "fixedVersion": "6.4.2-1.amzn2023.0.6",
      "fix": "ALAS2023-2026-3176",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3176",
      "released": "2026-11-07T01:07:25Z"
    },
    {
      "platform": "linux",
      "product": "python3.13-tornado-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.4.2-1.amzn2023.0.6",
      "fix": "ALAS2023-2026-3176",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3176",
      "released": "2026-11-07T01:07:25Z"
    },
    {
      "platform": "linux",
      "product": "python3.13-tornado-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "6.4.2-1.amzn2023.0.6",
      "fix": "ALAS2023-2026-3176",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3176",
      "released": "2026-11-07T01:07:25Z"
    },
    {
      "platform": "linux",
      "product": "python3.13-tornado-doc",
      "release": "amzn 2023",
      "fixedVersion": "6.4.2-1.amzn2023.0.6",
      "fix": "ALAS2023-2026-3176",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3176",
      "released": "2026-11-07T01:07:25Z"
    }
  ],
  "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"
  }
}