Description
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.
Published: 2026-10-14
Score: 8.2 High
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Thu, 15 Oct 2026 13:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1322
References
Metrics threat_severity

None

threat_severity

Moderate


Wed, 14 Oct 2026 23:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Nodemailer 3.0.0 before 10.0.10 Denial of Service via SMTP Reply Parsing
First Time appeared Nodemailer
Nodemailer nodemailer
Weaknesses CWE-400
CPEs cpe:2.3:a:nodemailer:nodemailer:*:*:*:*:*:*:*:*
Vendors & Products Nodemailer
Nodemailer nodemailer
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.2, 'vector': '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'}


Subscriptions

Nodemailer Nodemailer
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-15T13:30:56.785Z

Reserved: 2026-10-14T22:21:21.397Z

Link: CVE-2026-110872

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-14T23:17:29.097

Modified: 2026-10-14T23:17:29.097

Link: CVE-2026-110872

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-14T22:53:00Z

Links: CVE-2026-110872 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-15T12:00:18Z

Weaknesses
  • CWE-1322

    Use of Blocking Code in Single-threaded, Non-blocking Context

  • CWE-400

    Uncontrolled Resource Consumption