CVE-2026-82853

Nodemailer versions before 8.0.5 contain an SMTP command injection vulnerability in the transport name option used in EHLO/HELO commands. The name parameter is concatenated directly into SMTP commands without sanitizing carriage return and line feed characters, allowing attackers to inject arbitrary SMTP commands for email spoofing and phishing attacks.

  • Published Aug 31, 2026
  • CVSS 6.9 medium
  • 1.0% chance of exploitation in the next 30 days (EPSS)
  • A fix is available

Affected software

CVE-2026-82853 at the National Vulnerability Database