Nodemailer 3.0.0 before 10.0.10 Denial of Service via SMTP Reply Parsing
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.
CVE-2026-110872
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-110872
nodemailer
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "nodemailer",
"product": "nodemailer",
"versions": [
{
"status": "affected",
"version": "3.0.0",
"lessThan": "10.0.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "10.0.10",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/nodemailer",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-110872
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #28703 · Revision 1
- Added to Heist Feed
- Publisher date