HIGH 8.7 NVD
CVE-2026-90776
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
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.
References
- https://github.com/nodemailer/nodemailer
- https://github.com/nodemailer/nodemailer/blob/v10.0.4/src/addressparser/index.ts#L251
- https://github.com/nodemailer/nodemailer/commit/c07f17518d25aca8ab2ad66968dcbca538c24b89
- https://github.com/nodemailer/nodemailer/releases/tag/v10.0.5
- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-09-13 via NVD.
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