SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil.
{
"cwe_ids": [
"CWE-295",
"CWE-476"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-25T22:15:17Z",
"nvd_published_at": "2026-05-22T04:16:24Z",
"severity": "MODERATE"
}