CVE-2026-90776Nodemailer 9.1.0 through 10.0.4 Denial of Service via Quadratic Address Parsing
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No exploitation reported and no EPSS estimate yet.
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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 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-407
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
nodemailer nodemailer nodemailer:nodemailer (from the name) | from 9.1.0 before 10.0.5; 10.0.5 not affected | CNA record |
References
- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5vendor-advisory
- https://github.com/nodemailer/nodemailer/commit/c07f17518d25aca8ab2ad66968dcbca538c24b89patch
- https://github.com/nodemailer/nodemailer/blob/v10.0.4/src/addressparser/index.ts#L251technical-description
- https://github.com/nodemailer/nodemailer/releases/tag/v10.0.5release-notes
- https://github.com/nodemailer/nodemailerproduct
- https://www.vulncheck.com/advisories/nodemailer-9.1.0-through-10.0.4-denial-of-service-via-quadratic-address-parsingthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.