{
  "cveId": "CVE-2026-97689",
  "url": "https://patchblox.com/security/cve/CVE-2026-97689",
  "summary": "CVE-2026-97689 is fixed in 15 products on 1 platform, first by python3-urllib3 2.6.3-1ubuntu1.2, released September 29, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "urllib3: HTTPResponse.stream()/read_chunked() buffers an unbounded chunk-size line into memory",
  "description": "urllib3 is an HTTP client library for Python. From 1.10.3 until 2.8.0, the HTTPResponse.read_chunked and HTTPResponse.stream methods can allocate unbounded memory because the streaming chunk parser buffers the chunk-size field until newline or EOF without a length bound. The trigger is that a malicious server returns Transfer-Encoding: chunked followed by a very long run of bytes without a newline. The attack mechanism is that a malicious HTTP server sends a very long unterminated chunk-size line. The impact is that unbounded memory allocation can exhaust the client process. This issue is fixed in version 2.8.0.",
  "published": "2026-09-29T09:17:00Z",
  "severity": "Important",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "cwe": "Allocation of Resources Without Limits or Throttling",
  "epss": 0.00335,
  "epssPercentile": 0.26984,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97689",
  "fixes": [
    {
      "platform": "linux",
      "product": "python-urllib3",
      "release": "Debian 14",
      "fixedVersion": "2.8.0-1",
      "fix": "DEBIAN-CVE-2026-97689",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-97689",
      "released": "2026-09-30T20:39:22Z"
    },
    {
      "platform": "linux",
      "product": "python-urllib3",
      "release": "RHEL 10",
      "fixedVersion": "1.26.19-4.el10_2.2",
      "fix": "RHSA-2026:85930",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-85930",
      "released": "2026-09-29T15:36:05Z"
    },
    {
      "platform": "linux",
      "product": "python-urllib3",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.22-1ubuntu0.18.04.2\u002Besm5",
      "fix": "python-urllib3 1.22-1ubuntu0.18.04.2\u002Besm5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-urllib3-1.22-1ubuntu0.18.04.2-esm5",
      "released": "2026-10-19T16:27:57Z"
    },
    {
      "platform": "linux",
      "product": "python-urllib3",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "2.5.0-160000.8.1",
      "fix": "OPENSUSE-SU-2026:22071-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22071-1",
      "released": "2026-11-07T00:48:28Z"
    },
    {
      "platform": "linux",
      "product": "python-urllib3",
      "release": "rocky 10",
      "fixedVersion": "0:1.26.19-4.el10_2.2",
      "fix": "RLSA-2026:85930",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-85930",
      "released": "2026-11-07T00:39:51Z"
    },
    {
      "platform": "linux",
      "product": "python-urllib3",
      "release": "rocky 8",
      "fixedVersion": "0:1.24.2-11.el8_10",
      "fix": "RLSA-2026:90759",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-90759",
      "released": "2026-11-07T00:39:57Z"
    },
    {
      "platform": "linux",
      "product": "python-urllib3",
      "release": "rocky 9",
      "fixedVersion": "0:1.26.5-8.el9_8.2",
      "fix": "RLSA-2026:90494",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-90494",
      "released": "2026-11-07T00:39:57Z"
    },
    {
      "platform": "linux",
      "product": "python-urllib3",
      "release": "sles 15.6",
      "fixedVersion": "2.0.7-150400.7.36.1",
      "fix": "SUSE-SU-2026:4704-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4704-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "python-urllib3",
      "release": "sles 15.7",
      "fixedVersion": "2.0.7-150400.7.36.1",
      "fix": "SUSE-SU-2026:4704-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4704-1",
      "released": "2026-11-07T00:43:02Z"
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    {
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      "product": "python-urllib3",
      "release": "sles 16.0",
      "fixedVersion": "2.5.0-160000.8.1",
      "fix": "SUSE-SU-2026:24217-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24217-1",
      "released": "2026-11-07T00:45:20Z"
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    {
      "platform": "linux",
      "product": "python-urllib3_1",
      "release": "sles 15.6",
      "fixedVersion": "1.26.18-150600.3.14.1",
      "fix": "SUSE-SU-2026:4948-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4948-1",
      "released": "2026-11-07T00:43:02Z"
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    {
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      "release": "sles 15.7",
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      "fix": "SUSE-SU-2026:4948-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4948-1",
      "released": "2026-11-07T00:43:02Z"
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      "platform": "linux",
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      "fix": "ALAS2023-2026-3175",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3175",
      "released": "2026-11-07T01:07:25Z"
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      "released": "2026-11-07T01:07:25Z"
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    {
      "platform": "linux",
      "product": "python3-urllib3",
      "release": "RHEL 8",
      "fixedVersion": "0:1.24.2-11.el8_10",
      "fix": "RHSA-2026:90759",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-90759",
      "released": "2026-10-29T21:38:37Z"
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    {
      "platform": "linux",
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      "release": "RHEL 9",
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      "fix": "RHSA-2026:90494",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-90494",
      "released": "2026-10-29T21:40:03Z"
    },
    {
      "platform": "linux",
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      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.22-1ubuntu0.18.04.2\u002Besm5",
      "fix": "python3-urllib3 1.22-1ubuntu0.18.04.2\u002Besm5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python3-urllib3-1.22-1ubuntu0.18.04.2-esm5",
      "released": "2026-10-19T16:27:57Z"
    },
    {
      "platform": "linux",
      "product": "python3-urllib3",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.25.8-2ubuntu0.4\u002Besm6",
      "fix": "python3-urllib3 1.25.8-2ubuntu0.4\u002Besm6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-python3-urllib3-1.25.8-2ubuntu0.4-esm6",
      "released": "2026-10-19T16:28:02Z"
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    {
      "platform": "linux",
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      "release": "Ubuntu 22.04.1 LTS (jammy)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-python3-urllib3-1.26.5-1-exp1ubuntu0.8",
      "released": "2026-10-19T16:28:05Z"
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      "platform": "linux",
      "product": "python3-urllib3",
      "release": "Ubuntu 24.04.5 LTS (noble)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-python3-urllib3-2.0.7-1ubuntu0.8",
      "released": "2026-10-19T16:28:08Z"
    },
    {
      "platform": "linux",
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      "release": "Ubuntu 26.04.1 LTS (resolute)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-python3-urllib3-2.6.3-1ubuntu1.2",
      "released": "2026-09-29T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-urllib3",
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      "fix": "ALSA-2026:85930",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-85930",
      "released": "2026-11-07T00:40:04Z"
    },
    {
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      "release": "almalinux 8",
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      "fix": "ALSA-2026:90759",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-90759",
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      "url": "https://patchblox.com/security/fix/linux/alsa-2026-90494",
      "released": "2026-11-07T00:41:11Z"
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      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3184",
      "released": "2026-11-07T01:07:25Z"
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      "release": "ol 10",
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      "fix": "ELSA-2026-85930",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-85930",
      "released": "2026-11-07T00:59:15Z"
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      "fix": "RHSA-2026:92474",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-92474",
      "released": "2026-10-30T22:08:02Z"
    },
    {
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      "fix": "RHSA-2026:85929",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-85929",
      "released": "2026-10-21T16:56:56Z"
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      "url": "https://patchblox.com/security/fix/linux/elsa-2026-92474",
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      "fix": "ELSA-2026-85929",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-85929",
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      "fix": "RLSA-2026:92474",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-92474",
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    },
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      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-85929",
      "released": "2026-11-07T00:39:57Z"
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      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-84577",
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    }
  ],
  "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"
  }
}