{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "libxml2"
              },
              {
                "fixed": "2.15.4"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "4b637079f26d8f5879ed45eb18cd249cad261951"
            },
            {
              "fixed": "96498992efa48d52b0e8b83058bd88dbdaf153c1"
            },
            {
              "fixed": "d1686f91dbda141a752200419d35639fd6b38340"
            }
          ],
          "repo": "https://github.com/gnome/libxml2",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "mitre",
    "cwe_ids": [
      "CWE-121"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86140.json"
  },
  "details": "In libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow.",
  "id": "CVE-2026-86140",
  "modified": "2026-09-08T03:30:38.772510696Z",
  "published": "2026-09-05T04:26:13.860Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86140.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86140"
    },
    {
      "type": "FIX",
      "url": "https://github.com/GNOME/libxml2/commit/d1686f91dbda141a752200419d35639fd6b38340"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
      "type": "CVSS_V3"
    }
  ]
}