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    "aggregate_severity": {
      "text": "Critical"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
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    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      },
      {
        "category": "details",
        "text": "* SECURITY UPDATE: Directory traversal in tarfile extraction\n     - debian/patches/CVE-2007-4559.patch: make the PEP 706 extraction filters\n       available for tarfile and shutil.unpack_archive, including the 'data'\n       filter that rejects members escaping the destination directory. The\n       filters are opt-in and the default extraction behaviour is unchanged\n       (still 'fully_trusted', i.e. no filtering), matching upstream Python\n       3.9. Callers must opt in explicitly, via\n       tar.extractall(path, filter='data') per call,\n       TarFile.extraction_filter = tarfile.data_filter process-wide, or\n       shutil.unpack_archive(..., filter='data'); include the upstream\n       gh-135034 through gh-157265 rollups so the opt-in filters normalize\n       link targets, re-filter link fallbacks and directory fixups, skip\n       rejected members when errorlevel is zero, and resolve hardlink targets.\n     - CVE-2007-4559\n     - CVE-2024-12718\n     - CVE-2025-4138\n     - CVE-2025-4330\n     - CVE-2025-4435\n     - CVE-2025-4517\n     - CVE-2026-4360\n     - CVE-2026-7774\n     - CVE-2026-11940\n     - CVE-2026-19672\n     - CVE-2026-82049\n     - CVE-2026-87910",
        "title": "Details"
      }
    ],
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      "category": "vendor",
      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
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    "references": [
      {
        "category": "self",
        "summary": "https://cve.tuxcare.com/els/releases/CLSA-2026:1792483021",
        "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1792483021"
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        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/debian11els/advisories/2026/clsa-2026_1792483021.json"
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      "current_release_date": "2026-10-29T13:44:22Z",
      "generator": {
        "date": "2026-10-29T13:44:22Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CLSA-2026:1792483021",
      "initial_release_date": "2026-10-20T07:58:21Z",
      "revision_history": [
        {
          "date": "2026-10-20T07:58:21Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-10-29T13:44:22Z",
          "number": "2",
          "summary": "Update document"
        }
      ],
      "status": "final",
      "version": "2"
    },
    "title": "Fix CVE(s): CVE-2007-4559"
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          "category": "description",
          "text": "tarfile.extractall() with the 'data' or 'tar'\n filter could be bypassed by a crafted archive where a hardlink \nreferences a symlink stored at a deeper name than the hardlink itself.  \nThe extraction fallback validated the symlink at it's archived location \nbut recreated it at the hardlink's shallower\npath, letting a relative\n target the filter judged contained escape the destination directory.  \nThis allowed a malicious tar archive to create a symlink pointing \noutside the destination, enabling out-of-destination file reads or \nwrites. This was an incomplete fix of CVE-2025-4330.",
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          "summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/LD6QIISNQFQYOIEPJNEUIPV7S3V76FZH/",
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        "id": "CWE-59",
        "name": "Improper Link Resolution Before File Access ('Link Following')"
      },
      "notes": [
        {
          "category": "description",
          "text": "In CPython 3.13 and earlier, the tarfile module's data and tar extraction filters are vulnerable to crafted archives containing a hard link to a symbolic link. Such archives may cause extraction to modify the permissions or modification time of a file outside the destination directory, or expose the contents of that file within the extracted tree.",
          "title": "Vulnerability description"
        }
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          "summary": "https://github.com/python/cpython/commit/5a57248b22ad3b9aafcaaadae2c304a1923daeca",
          "url": "https://github.com/python/cpython/commit/5a57248b22ad3b9aafcaaadae2c304a1923daeca"
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        {
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        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/issues/157190",
          "url": "https://github.com/python/cpython/issues/157190"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/pull/157191",
          "url": "https://github.com/python/cpython/pull/157191"
        },
        {
          "category": "external",
          "summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/EFJWGAZJA56AKSBR2WHMHQZO7RRLZPRH/",
          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/EFJWGAZJA56AKSBR2WHMHQZO7RRLZPRH/"
        },
        {
          "category": "external",
          "summary": "http://www.openwall.com/lists/oss-security/2026/09/14/27",
          "url": "http://www.openwall.com/lists/oss-security/2026/09/14/27"
        }
      ],
      "release_date": "2026-09-14T19:14:03Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-20T07:57:02.745858Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1792483021",
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            "Debian-11:python3.9-venv-0:3.9.2-1+deb11u7+tuxcare.els4.armel"
          ],
          "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1792483021"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Critical"
        }
      ]
    }
  ]
}