{
  "cveId": "CVE-2026-97688",
  "url": "https://patchblox.com/security/cve/CVE-2026-97688",
  "summary": "CVE-2026-97688 is fixed in 3 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: Routine.",
  "title": "python-urllib3: urllib3 is an HTTP client library for Python",
  "description": "urllib3 is an HTTP client library for Python. From 2.6.2 until 2.8.0, HTTPResponse.stream and HTTPResponse.read_chunked can enter an infinite loop because the Deflate decoder retains trailing bytes as unconsumed input after reaching end-of-stream and repeatedly decodes them without progress. The issue occurs when an untrusted server sends a chunked Deflate response whose decoded body exceeds a positive finite chunk size and whose encoded body has trailing bytes, specifically a response with Transfer-Encoding: chunked and Content-Encoding: deflate, content decoding enabled, and the positive finite amt=N streaming chunk size. The attack mechanism is that a malicious server returns a compressed chunked response with trailing bytes after the Deflate stream. The impact is excessive CPU usage and a request that does not complete, and network read timeouts do not interrupt the loop because no further socket read occurs. This issue is fixed in version 2.8.0.",
  "published": "2026-09-29T09:17:00Z",
  "severity": "medium",
  "cvss": 5.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
  "epss": 0.00292,
  "epssPercentile": 0.21874,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "python-urllib3",
      "release": "Debian 14",
      "fixedVersion": "2.8.0-1",
      "fix": "DEBIAN-CVE-2026-97688",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-97688",
      "released": "2026-09-30T20:39:22Z"
    },
    {
      "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": "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"
    },
    {
      "platform": "linux",
      "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"
    },
    {
      "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"
    },
    {
      "platform": "linux",
      "product": "python-urllib3_1",
      "release": "sles 15.7",
      "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"
    },
    {
      "platform": "linux",
      "product": "python3-urllib3",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.6.3-1ubuntu1.2",
      "fix": "python3-urllib3 2.6.3-1ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-python3-urllib3-2.6.3-1ubuntu1.2",
      "released": "2026-09-29T09:17:00Z"
    }
  ],
  "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"
  }
}