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CVE-2026-82854

Nodemailer before 8.0.3 SMTP Command Injection via envelope.size PUBLISHED

Description (CNA)

Nodemailer before 8.0.4 is vulnerable to SMTP command injection through the unsanitized envelope.size parameter. When an application passes a custom envelope object with a size property containing CRLF characters to sendMail(), the value is concatenated into the SMTP MAIL FROM command (as SIZE=...) without sanitization, allowing injection of arbitrary SMTP commands such as RCPT TO to silently add attacker-controlled recipients. Exploitation requires the application to expose the envelope size to attacker-controlled input, as Nodemailer does not include size in the default auto-constructed envelope.

Affected (CNA)

Vendor / productVersions
nodemailer / nodemaileraffected 0 before 8.0.3; unaffected 8.0.3

CWE

CWE-93

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.