{
  "cveId": "CVE-2026-87910",
  "url": "https://patchblox.com/security/cve/CVE-2026-87910",
  "summary": "CVE-2026-87910 is fixed in 34 products on 3 platforms, first by DEBIAN-CVE-2026-87910, released September 11, 2026. 10 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "tarfile hardlink fallback ignores custom extraction filter rejection via None",
  "description": "When tarfile extracts a link on a system that doesn\u0027t support links, it falls back to extracting a member from the archive. In this case, the filter function is run twice: once for the extracted member, and once with name set to the location of the link. For one of the calls, the return value was ignored. Instead, the member should be skipped if either call returns None.",
  "published": "2026-09-11T18:16:59Z",
  "severity": "Moderate",
  "cvss": 5.7,
  "cwe": "Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
  "epss": 0.00609,
  "epssPercentile": 0.49454,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87910",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Python 3.13",
      "fixedVersion": "3.13.16",
      "fix": "Python 3.13 3.13.16",
      "url": "https://patchblox.com/security/fix/windows-app/python.python.3.13-3.13.16",
      "released": "2026-09-30T00:00:00Z"
    },
    {
      "platform": "windows-app",
      "product": "Python 3.14",
      "fixedVersion": "3.14.9",
      "fix": "Python 3.14 3.14.9",
      "url": "https://patchblox.com/security/fix/windows-app/python.python.3.14-3.14.9",
      "released": "2026-10-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "pypy3",
      "release": "Debian 14",
      "fixedVersion": "8.0.1\u002Bdfsg-1",
      "fix": "DEBIAN-CVE-2026-87910",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-87910",
      "released": "2026-09-11T18:16:59Z"
    },
    {
      "platform": "linux",
      "product": "python3.11",
      "release": "amzn 2023",
      "fixedVersion": "3.11.17-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3231",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3231",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "python3.11-debug",
      "release": "amzn 2023",
      "fixedVersion": "3.11.17-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3231",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3231",
      "released": "2026-11-07T01:06:07Z"
    },
    {
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      "product": "python3.11-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "3.11.17-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3231",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3231",
      "released": "2026-11-07T01:06:07Z"
    },
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      "product": "python3.11-debugsource",
      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-3231",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3231",
      "released": "2026-11-07T01:06:07Z"
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    {
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      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-3231",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3231",
      "released": "2026-11-07T01:06:07Z"
    },
    {
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      "fix": "ALAS2023-2026-3231",
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      "fix": "ALAS2023-2026-3231",
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      "released": "2026-11-07T01:06:07Z"
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      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-3231",
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      "released": "2026-11-07T01:06:07Z"
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      "fix": "ALAS2023-2026-3231",
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      "released": "2026-11-07T01:06:07Z"
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      "product": "python3.12",
      "release": "amzn 2023",
      "fixedVersion": "3.12.15-2.amzn2023.0.1",
      "fix": "ALAS2023-2026-3230",
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      "released": "2026-11-07T01:06:07Z"
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      "fix": "ALAS2023-2026-3230",
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      "fix": "ALAS2023-2026-3230",
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      "released": "2026-11-07T01:06:07Z"
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      "released": "2026-11-07T01:06:07Z"
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      "released": "2026-11-07T01:06:07Z"
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      "released": "2026-11-07T01:06:07Z"
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      "fix": "ALAS2023-2026-3230",
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      "fix": "ALAS2023-2026-3230",
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    },
    {
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      "product": "python3.14",
      "release": "Debian 14",
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      "fix": "DEBIAN-CVE-2026-87910",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-87910",
      "released": "2026-09-11T18:16:59Z"
    },
    {
      "platform": "linux",
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      "release": "Debian 14",
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      "fix": "DEBIAN-CVE-2026-87910",
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      "released": "2026-09-11T18:16:59Z"
    }
  ],
  "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": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}