Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the database. A distinct attack is possible if the application declares a user-controlled column as a "refint" cascade primary key and facilitates user-controlled updates to that column. In that case, a SQL injection allows a primary key update value provider to execute arbitrary SQL as the database user performing the primary key update. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.
{
"sources": [
{
"modified": "2026-05-18T15:05:21.300Z",
"published": "2026-05-14T14:16:25.820Z",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6637",
"database_specific": {
"status": "Analyzed"
},
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-6637",
"id": "CVE-2026-6637",
"imported": "2026-06-08T13:34:10.069Z"
}
],
"license": "CC-BY-4.0"
}