CVE-2026-92598highCWE-436

CVE-2026-92598: high-severity vulnerability in nodemailer

Nodemailer before 9.1.0 IDN/Punycode Domain Allow-list Bypass

Published · Updated

Follow this CVE+ Monitor nodemailer+ Monitor node-nodemailer

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.3epss 0.4%
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.
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Affected products
nodemailer · nodemailer
Related CVEs — nodemailer

In the same product, most dangerous first.

CVE-2026-82854CRITICALNodemailer before 8.0.4 SMTP Command Injection via envelope.sizeEPSS 2.0%CVE-2026-82853MEDIUMNodemailer before 8.0.5 SMTP Command Injection via CRLFEPSS 1.0%CVE-2026-92596HIGHNodemailer before 9.1.0 Denial of Service via addressparserEPSS 0.8%CVE-2026-90776HIGHNodemailer 9.1.0 through 10.0.4 Denial of Service via Quadratic Address ParsingEPSS 0.7%CVE-2025-14874HIGHNodemailer: nodemailer: denial of service via crafted email address headerEPSS 0.6%CVE-2025-13033HIGHNodemailer: nodemailer: email to an unintended domain can occur due to interpretation conflictEPSS 0.6%