In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers.
{
"license": "CC-BY-4.0",
"sources": [
{
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56132",
"database_specific": {
"status": "Analyzed"
},
"modified": "2026-06-23T20:15:26.230Z",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-56132",
"imported": "2026-08-09T01:17:11.844Z",
"id": "CVE-2026-56132",
"published": "2026-06-19T06:17:10.253Z"
}
]
}