CVE-2026-90776
highNodemailer 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.
CVSS
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (disclosure@vulncheck.com)
Timeline (UTC)
Published: 2026-09-13 12:17
Modified: 2026-09-24 20:47
NVD status: Awaiting Analysis
Last synced 1 day ago
Verified against the source API 2026-10-27 06:52 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/nodemailer/nodemailer disclosure@vulncheck.com
- https://github.com/nodemailer/nodemailer/blob/v10.0.4/src/addressparser/index.ts#L251 disclosure@vulncheck.com
- https://github.com/nodemailer/nodemailer/commit/c07f17518d25aca8ab2ad66968dcbca538c24b89 disclosure@vulncheck.com
- https://github.com/nodemailer/nodemailer/releases/tag/v10.0.5 disclosure@vulncheck.com
- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/nodemailer-9.1.0-through-10.0.4-denial-of-service-via... disclosure@vulncheck.com
- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:52 UTC · record ↗