Is CVE-2026-82661 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-82661?

CVE-2026-82661 has a CVSS v3 severity of MEDIUM (5.4).

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CVE-2026-82661

Description

Nodemailer before 8.0.9 fails to sanitize carriage return and line feed characters in list comment fields, allowing attackers to inject arbitrary message headers. An attacker with control over list.*.comment parameters can inject CRLF sequences to create additional headers in generated RFC822 messages, altering mail client behavior and message semantics.