libexpat before 2.8.2 has an integer overflow in storeAtts.
{
"license": "CC-BY-4.0",
"sources": [
{
"database_specific": {
"status": "Analyzed"
},
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56403",
"id": "CVE-2026-56403",
"imported": "2026-08-09T01:17:11.862Z",
"modified": "2026-06-23T20:15:16.760Z",
"published": "2026-06-21T16:16:26.590Z",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-56403"
}
]
}