In xsltCopyText in transform.c in libxslt 1.1.33, a pointer variable isn't reset under certain circumstances. If the relevant memory area happened to be freed and reused in a certain way, a bounds check could fail and memory outside a buffer could be written to, or uninitialized data could be disclosed.
{
"sources": [
{
"id": "CVE-2019-18197",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2019-18197",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2019-18197",
"database_specific": {
"status": "Modified"
},
"imported": "2026-06-07T01:46:46.595Z",
"modified": "2026-05-28T19:16:33.373Z",
"published": "2019-10-18T21:15:10.793Z"
}
],
"license": "CC-BY-4.0"
}