A flaw was found in ImageMagick in versions 7.0.11, where an integer overflow in WriteTHUMBNAILImage of coders/thumbnail.c may trigger undefined behavior via a crafted image file that is submitted by an attacker and processed by an application using ImageMagick. The highest threat from this vulnerability is to system availability.
{
"sources": [
{
"modified": "2026-06-17T03:33:39.200Z",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-20312",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20312",
"published": "2021-05-11T23:15:08.850Z",
"id": "CVE-2021-20312",
"database_specific": {
"status": "Modified"
},
"imported": "2026-07-30T14:08:42.986Z"
}
],
"license": "CC-BY-4.0"
}