{
  "threat_severity" : "Moderate",
  "public_date" : "2026-03-16T17:52:26Z",
  "bugzilla" : {
    "description" : "cpython: Stack overflow parsing XML with deeply nested DTD content models",
    "id" : "2448181",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2448181"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.9",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-805",
  "details" : [ "When an Expat parser with a registered ElementDeclHandler parses an inline\ndocument type definition containing a deeply nested content model a C stack\noverflow occurs.", "A stack overflow flaw has been discovered in the python pyexpat module. When an Expat parser with a registered ElementDeclHandler parses an inline document type definition containing a deeply nested content model a C stack overflow occurs. This will result in a program crash." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-05-19T00:00:00Z",
    "advisory" : "RHSA-2026:19019",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "python3.14-0:3.14.4-2.el10_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-05-19T00:00:00Z",
    "advisory" : "RHSA-2026:19064",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "python3.12-0:3.12.13-2.el10_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-04-27T00:00:00Z",
    "advisory" : "RHSA-2026:10950",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8",
    "package" : "python3.12-0:3.12.13-2.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-05-19T00:00:00Z",
    "advisory" : "RHSA-2026:19176",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "python3.14-0:3.14.4-2.el9_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-05-19T00:00:00Z",
    "advisory" : "RHSA-2026:19177",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "python3.12-0:3.12.13-2.el9_8"
  }, {
    "product_name" : "Red Hat Hardened Images",
    "release_date" : "2026-04-10T00:00:00Z",
    "advisory" : "RHSA-2026:7443",
    "cpe" : "cpe:/a:redhat:hummingbird:1",
    "package" : "python3-13-main-3.13.13-1.hum1"
  }, {
    "product_name" : "Red Hat Hardened Images",
    "release_date" : "2026-04-11T00:00:00Z",
    "advisory" : "RHSA-2026:7661",
    "cpe" : "cpe:/a:redhat:hummingbird:1",
    "package" : "python3-14-main-3.14.4-1.hum1"
  }, {
    "product_name" : "Red Hat Hardened Images",
    "release_date" : "2026-04-17T00:00:00Z",
    "advisory" : "RHSA-2026:8822",
    "cpe" : "cpe:/a:redhat:hummingbird:1",
    "package" : "python3-11-main-3.11.15-4.hum1"
  }, {
    "product_name" : "Red Hat Hardened Images",
    "release_date" : "2026-04-17T00:00:00Z",
    "advisory" : "RHSA-2026:8824",
    "cpe" : "cpe:/a:redhat:hummingbird:1",
    "package" : "python3-12-main-3.12.13-3.hum1"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Fix deferred",
    "package_name" : "python",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Fix deferred",
    "package_name" : "python",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Fix deferred",
    "package_name" : "python3",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "python3",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "python3.11",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "python36:3.6/python36",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "python39-devel:3.9/python39",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "python3.11",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "python3.9",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Fix deferred",
    "package_name" : "rhelai3/bootc-aws-cuda-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Fix deferred",
    "package_name" : "rhelai3/bootc-azure-cuda-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Fix deferred",
    "package_name" : "rhelai3/bootc-azure-rocm-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Fix deferred",
    "package_name" : "rhelai3/bootc-cuda-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Fix deferred",
    "package_name" : "rhelai3/bootc-gcp-cuda-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Fix deferred",
    "package_name" : "rhelai3/bootc-rocm-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-4224\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-4224\nhttps://github.com/python/cpython/commit/196edfb06a7458377d4d0f4b3cd41724c1f3bd4a\nhttps://github.com/python/cpython/commit/e0a8a6da90597a924b300debe045cdb4628ee1f3\nhttps://github.com/python/cpython/commit/eb0e8be3a7e11b87d198a2c3af1ed0eccf532768\nhttps://github.com/python/cpython/issues/145986\nhttps://github.com/python/cpython/pull/145987\nhttps://mail.python.org/archives/list/security-announce@python.org/thread/5M7CGUW3XBRY7II4DK43KF7NQQ3TPZ6R/" ],
  "name" : "CVE-2026-4224",
  "mitigation" : {
    "value" : "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
    "lang" : "en:us"
  },
  "csaw" : false
}