libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen.
{
"sources": [
{
"imported": "2026-08-09T01:17:11.942Z",
"id": "CVE-2026-56407",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-56407",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56407",
"modified": "2026-06-23T16:28:29.983Z",
"database_specific": {
"status": "Analyzed"
},
"published": "2026-06-21T16:16:27.987Z"
}
],
"license": "CC-BY-4.0"
}