X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name. A certificate whose Subject CN violates an issuing CA's DNS name constraints could be accepted.
{
"sources": [
{
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-6731",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6731",
"id": "CVE-2026-6731",
"modified": "2026-06-27T20:02:06.700Z",
"imported": "2026-07-17T22:36:56.935Z",
"published": "2026-06-25T21:16:28.400Z",
"database_specific": {
"status": "Analyzed"
}
},
{
"url": "https://api.github.com/advisories/GHSA-9c3c-227q-3j67",
"html_url": "https://github.com/advisories/GHSA-9c3c-227q-3j67",
"imported": "2026-07-17T22:36:57.127Z",
"modified": "2026-06-27T21:30:28Z",
"published": "2026-06-25T21:31:32Z",
"id": "GHSA-9c3c-227q-3j67"
},
{
"url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-39555",
"html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39555",
"published": "2026-06-25T20:08:13Z",
"imported": "2026-07-17T22:37:06.890Z",
"id": "EUVD-2026-39555",
"modified": "2026-06-26T13:16:07Z"
}
],
"license": "CC-BY-4.0"
}