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Vulnerabilities

Vulnerability · CVE-2026-110872

Nodemailer 3.0.0 before 10.0.10 Denial of Service via SMTP Reply Parsing

Published Oct 14, 2026 · catalog updated Oct 15, 2026 · Nodemailer 3.0.0 before 10.0.10

Check if you run it

No confirmed exploitation is on record for CVE-2026-110872. EPSS is 0.29%. Act only if a listed version of Nodemailer 3.0.0 before 10.0.10 is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Nodemailer 3.0.0 before 10.0.10).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.29%
Remediation
Advisory link
Affected products
package maven · package npm · vendor nodemailer nodemailer

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • package mavenversion unspecified
  • package npmversion unspecified
  • vendor nodemailer nodemailerversion unspecified

How to fix CVE-2026-110872

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-110872. EPSS is 0.29%. Act only if a listed version of Nodemailer 3.0.0 before 10.0.10 is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-400: Uncontrolled Resource Consumption. EPSS 0.29%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 14, 2026 · NIST NVD

    Detected

    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.

  2. Oct 15, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-110872

    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 lin

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-110872

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2026-110872

    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 lin

    nvd.nist.gov
  • Snyk Vulnerability DatabasePackage advisorySNYK-JAVA-ORGWEBJARSNPM-20953005

    Inefficient Algorithmic Complexity

    security.snyk.io
  • Snyk Vulnerability DatabasePackage advisorySNYK-JS-NODEMAILER-20953004

    Inefficient Algorithmic Complexity

    security.snyk.io

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.