Nodemailer before 9.1.0 fails to apply UTS-46 normalization when encoding international domain names, causing the domain resolver to compute a different Punycode A-label than standards-compliant parsers. Attackers can craft recipient addresses with invisible characters or compatibility mappings that pass domain allow-list checks but are delivered to attacker-controlled domains via SMTP.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-436"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92598.json"
}{
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "9.1.0"
}
],
"source": [
"DESCRIPTION",
"REFERENCES"
]
}