NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.12.8 and 2.11.17, an unauthenticated peer with network access to a leafnode listener with compression enabled could crash the server during the pre-authentication leafnode handshake by sending repeated leafnode INFO protocol messages before authentication and account setup completed. This issue is fixed in versions 2.12.8 and 2.11.17.
{
"license": "CC-BY-4.0",
"sources": [
{
"database_specific": {
"status": "Analyzed"
},
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58250",
"id": "CVE-2026-58250",
"imported": "2026-08-03T18:16:27.586Z",
"modified": "2026-07-13T15:18:46.507Z",
"published": "2026-07-08T20:16:54.483Z",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-58250"
}
]
}