CVE-2026-90776

HighCVSS 7.5/10Last modified Sep 24, 2026

Description

Nodemailer versions 9.1.0 through 10.0.4 contain a quadratic time complexity vulnerability in the addressparser component when parsing email addresses with RFC 5322 comments. Attackers can craft malicious email headers with comment-separated atoms to consume excessive CPU and block the Node.js event loop for several seconds, causing denial of service.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-407

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
nodemailer	nodemailer	>= 9.1.0, < 10.0.5

References

Timeline

Published: Sep 13, 2026
Last modified: Sep 24, 2026
NVD status: Awaiting Analysis

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