{
  "cveId": "CVE-2026-3276",
  "url": "https://patchblox.com/security/cve/CVE-2026-3276",
  "summary": "CVE-2026-3276 is fixed in 99 products on 3 platforms, first by idle-python3.14 3.14.4-1ubuntu0.1, released June 8, 2026. 10 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Potential DoS via quadratic complexity in unicodedata.normalize()",
  "description": "unicodedata.normalize() can take excessive CPU time when processing\nspecially crafted Unicode input containing long runs of combining characters\nwith alternating Canonical Combining Class values.\nThis affects all normalization forms.",
  "published": "2026-06-03T09:16:00Z",
  "severity": "Moderate",
  "cvss": 6.3,
  "cwe": "Inefficient Algorithmic Complexity",
  "epss": 0.00486,
  "epssPercentile": 0.42114,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-3276",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Python 3.13",
      "fixedVersion": "3.13.14",
      "fix": "Python 3.13 3.13.14",
      "url": "https://patchblox.com/security/fix/windows-app/python.python.3.13-3.13.14",
      "released": "2026-06-10T00:00:00Z"
    },
    {
      "platform": "windows-app",
      "product": "Python 3.14",
      "fixedVersion": "3.14.6",
      "fix": "Python 3.14 3.14.6",
      "url": "https://patchblox.com/security/fix/windows-app/python.python.3.14-3.14.6",
      "released": "2026-06-10T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "idle-python3.10",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "3.10.12-1~22.04.16",
      "fix": "idle-python3.10 3.10.12-1~22.04.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-idle-python3.10-3.10.12-1-22.04.16",
      "released": "2026-07-07T15:29:00Z"
    },
    {
      "platform": "linux",
      "product": "idle-python3.12",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.12.3-1ubuntu0.15",
      "fix": "idle-python3.12 3.12.3-1ubuntu0.15",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-idle-python3.12-3.12.3-1ubuntu0.15",
      "released": "2026-07-07T15:29:03Z"
    },
    {
      "platform": "linux",
      "product": "idle-python3.14",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.14.4-1ubuntu0.1",
      "fix": "idle-python3.14 3.14.4-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-idle-python3.14-3.14.4-1ubuntu0.1",
      "released": "2026-06-08T16:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libpython3.10",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
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      "fix": "libpython3.10 3.10.12-1~22.04.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libpython3.10-3.10.12-1-22.04.16",
      "released": "2026-07-07T15:29:00Z"
    },
    {
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      "product": "libpython3.10-minimal",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
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      "fix": "libpython3.10-minimal 3.10.12-1~22.04.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libpython3.10-minimal-3.10.12-1-22.04.16",
      "released": "2026-07-07T15:29:00Z"
    },
    {
      "platform": "linux",
      "product": "libpython3.10-stdlib",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "3.10.12-1~22.04.16",
      "fix": "libpython3.10-stdlib 3.10.12-1~22.04.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libpython3.10-stdlib-3.10.12-1-22.04.16",
      "released": "2026-07-07T15:29:00Z"
    },
    {
      "platform": "linux",
      "product": "libpython3.10-testsuite",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libpython3.10-testsuite-3.10.12-1-22.04.16",
      "released": "2026-07-07T15:29:00Z"
    },
    {
      "platform": "linux",
      "product": "libpython3.12-minimal",
      "release": "Ubuntu 24.04.5 LTS (noble)",
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      "fix": "libpython3.12-minimal 3.12.3-1ubuntu0.15",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libpython3.12-minimal-3.12.3-1ubuntu0.15",
      "released": "2026-07-07T15:29:03Z"
    },
    {
      "platform": "linux",
      "product": "libpython3.12-stdlib",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.12.3-1ubuntu0.15",
      "fix": "libpython3.12-stdlib 3.12.3-1ubuntu0.15",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libpython3.12-stdlib-3.12.3-1ubuntu0.15",
      "released": "2026-07-07T15:29:03Z"
    },
    {
      "platform": "linux",
      "product": "libpython3.12-testsuite",
      "release": "Ubuntu 24.04.5 LTS (noble)",
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      "fix": "libpython3.12-testsuite 3.12.3-1ubuntu0.15",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libpython3.12-testsuite-3.12.3-1ubuntu0.15",
      "released": "2026-07-07T15:29:03Z"
    },
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      "product": "libpython3.12t64",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libpython3.12t64-3.12.3-1ubuntu0.15",
      "released": "2026-07-07T15:29:03Z"
    },
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      "platform": "linux",
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      "release": "Ubuntu 26.04.1 LTS (resolute)",
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      "fix": "libpython3.14 3.14.4-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libpython3.14-3.14.4-1ubuntu0.1",
      "released": "2026-06-08T16:17:00Z"
    },
    {
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      "product": "libpython3.14-minimal",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.14.4-1ubuntu0.1",
      "fix": "libpython3.14-minimal 3.14.4-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libpython3.14-minimal-3.14.4-1ubuntu0.1",
      "released": "2026-06-08T16:17:00Z"
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libpython3.14-stdlib-3.14.4-1ubuntu0.1",
      "released": "2026-06-08T16:17:00Z"
    },
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      "platform": "linux",
      "product": "libpython3.14-testsuite",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.14.4-1ubuntu0.1",
      "fix": "libpython3.14-testsuite 3.14.4-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libpython3.14-testsuite-3.14.4-1ubuntu0.1",
      "released": "2026-06-08T16:17:00Z"
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      "platform": "linux",
      "product": "python",
      "release": "sles 15.7",
      "fixedVersion": "2.7.18-150000.123.1",
      "fix": "SUSE-SU-2026:3635-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3635-1",
      "released": "2026-08-18T07:52:16Z"
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      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3635-1",
      "released": "2026-08-18T07:52:16Z"
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      "platform": "linux",
      "product": "python-unversioned-command",
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      "fixedVersion": "3.9.25-1.amzn2023.0.8",
      "fix": "ALAS2023-2026-1963",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1963",
      "released": "2026-07-20T09:00:00Z"
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      "released": "2026-07-20T09:00:00Z"
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      "fix": "SUSE-SU-2026:4754-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4754-1",
      "released": "2026-11-07T00:42:08Z"
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-python3.10-examples-3.10.12-1-22.04.16",
      "released": "2026-07-07T15:29:00Z"
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-python3.10-full-3.10.12-1-22.04.16",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-python3.10-venv-3.10.12-1-22.04.16",
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      "released": "2026-08-19T09:54:54Z"
    }
  ],
  "noFixYet": [
    {
      "platform": "Windows apps",
      "product": "Python 2",
      "status": "no-fix",
      "affectedVersion": "2.7.18150"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.10",
      "status": "no-fix",
      "affectedVersion": "3.10.11"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.11",
      "status": "no-fix",
      "affectedVersion": "3.11.9"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.12",
      "status": "no-fix",
      "affectedVersion": "3.12.10"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.5",
      "status": "no-fix",
      "affectedVersion": "3.5.4"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.6",
      "status": "no-fix",
      "affectedVersion": "3.6.8"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.7",
      "status": "no-fix",
      "affectedVersion": "3.7.9"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.8",
      "status": "no-fix",
      "affectedVersion": "3.8.10"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.9",
      "status": "no-fix",
      "affectedVersion": "3.9.13"
    },
    {
      "platform": "macOS",
      "product": "Python3",
      "status": "no-fix",
      "affectedVersion": "3.13.13"
    }
  ],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}