{"id":"CVE-2026-90776","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-90776","summary":"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…","details":"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.","published":"2026-09-13T12:17:16.547","modified":"2026-09-13T12:17:16.547","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/nodemailer/nodemailer/commit/c07f17518d25aca8ab2ad66968dcbca538c24b89","label":"nodemailer/nodemailer@c07f175"},"references":[{"type":"WEB","url":"https://github.com/nodemailer/nodemailer"},{"type":"WEB","url":"https://github.com/nodemailer/nodemailer/blob/v10.0.4/src/addressparser/index.ts#L251"},{"type":"WEB","url":"https://github.com/nodemailer/nodemailer/commit/c07f17518d25aca8ab2ad66968dcbca538c24b89"},{"type":"WEB","url":"https://github.com/nodemailer/nodemailer/releases/tag/v10.0.5"},{"type":"WEB","url":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/nodemailer-9.1.0-through-10.0.4-denial-of-service-via-quadratic-address-parsing"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-13T12:17:16.547"}}