CVE-2026-110872CWE-400denial-of-service

CVE-2026-110872

Medium · published October 15, 2026

CVSS v3.1
5.9
EPSS
0%
Percentile
20.5
In the wild
Unconfirmed
What it is

Nodemailer from 3.0.0 before 10.0.10 contains a quadratic complexity denial of service vulnerability in the SMTP client reply parser in SMTPConnection._onData and isPartialResponse. A malicious SMTP server or on-path attacker can stream continuation lines without a completion line before authentication, blocking the Node.js event loop and exhausting memory.

The record
Technical detail
CVSS v3.1
5.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
8.2 · CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00291 · 20.5th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2026-10-15T03:17Z
References (3)
https://github.com/nodemailer/nodemailer/security/advisories/GHSA-4g23-2xm8-66gc · [email protected]https://www.vulncheck.com/advisories/nodemailer-3.0.0-before-10.0.10-denial-of-service-via-smtp-reply-parsing · [email protected]https://github.com/nodemailer/nodemailer/security/advisories/GHSA-4g23-2xm8-66gc · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 16 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 14 OCT 22:53Z
    Nodemailer 3.0.0 before 10.0.10 Denial of Service via SMTP Reply Parsing
    cvelistv5
  • 14 OCT 22:53Z
    Nodemailer 3.0.0 before 10.0.10 Denial of Service via SMTP Reply Parsing
    cvelistv5