GHSA-8626-CQQJ-MFFF

Vulnerability from github – Published: 2026-09-08 12:31 – Updated: 2026-09-28 15:31
VLAI
Details

A flaw was found in libxml2 with Python bindings enabled. A remote attacker could exploit this vulnerability by providing a specially crafted XML document containing a Document Type Definition (DTD) with enumerated attribute values. This triggers a double-free error in the SAX attributeDecl callback handler, where a string is freed twice. This flaw can lead to a denial of service (DoS) due to a reproducible crash in Python applications using the libxml2 SAX bindings.

Severity
8.5 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-74860"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-763"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-08T12:16:58Z",
    "severity": "HIGH"
  },
  "details": "A flaw was found in libxml2 with Python bindings enabled. A remote attacker could exploit this vulnerability by providing a specially crafted XML document containing a Document Type Definition (DTD) with enumerated attribute values. This triggers a double-free error in the SAX attributeDecl callback handler, where a string is freed twice. This flaw can lead to a denial of service (DoS) due to a reproducible crash in Python applications using the libxml2 SAX bindings.",
  "id": "GHSA-8626-cqqj-mfff",
  "modified": "2026-09-28T15:31:20Z",
  "published": "2026-09-08T12:31:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74860"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64463"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:71585"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:71586"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:71641"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:72470"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:72475"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:72476"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-74860"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2529697"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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