xmlwf in libexpat before 2.8.2 has an integer overflow for the output filename when -d outputDir is used.
{
"sources": [
{
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56409",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-56409",
"modified": "2026-06-23T16:21:55.607Z",
"published": "2026-06-21T16:16:28.230Z",
"imported": "2026-08-09T01:17:11.977Z",
"id": "CVE-2026-56409",
"database_specific": {
"status": "Analyzed"
}
}
],
"license": "CC-BY-4.0"
}