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    "aggregate_severity": {
      "text": "Low"
    },
    "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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      {
        "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": "CVE-2026-18503: csv.Sniffer._guess_quote_and_delimiter() probed the sample\n  with four dialect regexes whose quoted-field body was a lazy \".*?\" compiled\n  under re.DOTALL | re.MULTILINE. Because \".*?\" is not anchored to the first\n  undoubled quote, every candidate start position rescanned the sample to its\n  end, so csv.Sniffer.sniff() on attacker-supplied CSV - classically a single\n  column of quoted values - ran in quadratic time and could consume excessive\n  CPU (CWE-1333, inefficient regular expression complexity). Backport of\n  cpython fd78b565 (gh-98820): the body is rebuilt as an unrolled loop, which\n  is unambiguous and therefore does not backtrack. The 3.10 variant is used\n  because the 3.11+ form relies on a possessive quantifier that re in 3.9\n  cannot parse.",
        "title": "Details"
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      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
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        "category": "self",
        "summary": "https://cve.tuxcare.com/els-alt-python/releases/CLSA-2026:1788182964",
        "url": "https://cve.tuxcare.com/els-alt-python/releases/CLSA-2026:1788182964"
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        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_alt_python/el10/advisories/2026/clsa-2026_1788182964.json"
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      "current_release_date": "2026-08-31T13:30:08Z",
      "generator": {
        "date": "2026-08-31T13:30:08Z",
        "engine": {
          "name": "pyCSAF"
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      "id": "CLSA-2026:1788182964",
      "initial_release_date": "2026-08-31T13:30:08Z",
      "revision_history": [
        {
          "date": "2026-08-31T13:30:08Z",
          "number": "1",
          "summary": "Initial version"
        }
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      "status": "final",
      "version": "1"
    },
    "title": "alt-python39: Fix of CVE-2026-18503"
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          "summary": "https://github.com/python/cpython/pull/153694",
          "url": "https://github.com/python/cpython/pull/153694"
        },
        {
          "category": "external",
          "summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/KQ7NBMCPAZJHRROQXJQE4GMXGLD5KHBS/",
          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/KQ7NBMCPAZJHRROQXJQE4GMXGLD5KHBS/"
        }
      ],
      "release_date": "2026-08-10T14:17:00Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-31T13:29:26.255564Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els-alt-python/releases/CLSA-2026:1788182964",
          "product_ids": [
            "CentOS-10:alt-python39-0:3.9.23-26.el10.x86_64",
            "CentOS-10:alt-python39-debug-0:3.9.23-26.el10.x86_64",
            "CentOS-10:alt-python39-devel-0:3.9.23-26.el10.x86_64",
            "CentOS-10:alt-python39-idle-0:3.9.23-26.el10.x86_64",
            "CentOS-10:alt-python39-libs-0:3.9.23-26.el10.x86_64",
            "CentOS-10:alt-python39-test-0:3.9.23-26.el10.x86_64",
            "CentOS-10:alt-python39-tkinter-0:3.9.23-26.el10.x86_64"
          ],
          "url": "https://cve.tuxcare.com/els-alt-python/releases/CLSA-2026:1788182964"
        },
        {
          "category": "none_available",
          "date": "2026-08-10T14:17:00Z",
          "details": "Affected",
          "product_ids": [
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            "CentOS-10:alt-python39-0:3.9.23-21.el10.x86_64",
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ]
    }
  ]
}