CVE-2026-90776CWE-407

CVE-2026-90776

High · published September 13, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
52.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00684 · 52.0th percentile
Weakness
CWE-407 · Inefficient Algorithmic Complexity
Published
2026-09-13T16:17Z
References (7)
https://github.com/nodemailer/nodemailer · [email protected]https://github.com/nodemailer/nodemailer/blob/v10.0.4/src/addressparser/index.ts#L251 · [email protected]https://github.com/nodemailer/nodemailer/commit/c07f17518d25aca8ab2ad66968dcbca538c24b89 · [email protected]https://github.com/nodemailer/nodemailer/releases/tag/v10.0.5 · [email protected]https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5 · [email protected]https://www.vulncheck.com/advisories/nodemailer-9.1.0-through-10.0.4-denial-of-service-via-quadratic-address-parsing · [email protected]https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 15 SEP 03:22Z
    EPSS moved — → 0%
    epss
  • 13 SEP 11:42Z
    Nodemailer 9.1.0 through 10.0.4 Denial of Service via Quadratic Address Parsing
    cvelistv5