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Vulnerabilities

Vulnerability · CVE-2026-110870

Nodemailer from 3.0.0 before 10.0.13 contains an improper input validation vulnerability in its address parser that fails to strip RFC 5322 comments inside angle-bracket addresses.

Published Oct 14, 2026 · catalog updated Oct 14, 2026 · Nodemailer from 3.0.0 before

Check if you run it

No confirmed exploitation is on record for CVE-2026-110870. EPSS is 0.22%. Act only if a listed version of Nodemailer from 3.0.0 before 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 from 3.0.0 before).
  • 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
Medium6.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.22%
Remediation
Advisory link
Affected products
package maven · package npm · vendor nodemailer nodemailer

Nodemailer from 3.0.0 before 10.0.13 contains an improper input validation vulnerability in its address parser that fails to strip RFC 5322 comments inside angle-bracket addresses. Attackers can supply recipients like a display name with a parenthesized comment in the domain, so illegal characters reach envelope.to and RCPT TO, causing rejected delivery or parser interpretation conflicts that bypass domain allow-lists.

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-2026-110870

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-2026-110870. EPSS is 0.22%. Act only if a listed version of Nodemailer from 3.0.0 before 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-20: Improper Input Validation. EPSS 0.22%. 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 10.0.13 contains an improper input validation vulnerability in its address parser that fails to strip RFC 5322 comments inside angle-bracket addresses. Attackers can supply recipients like a display name with a parenthesized comment in the domain, so illegal characters reach envelope.to and RCPT TO, causing rejected delivery or parser interpretation conflicts that bypa

Sources

  • CVE.orgVulnerability recordCVE-2026-110870

    Nodemailer from 3.0.0 before 10.0.13 contains an improper input validation vulnerability in its address parser that fails to strip RFC 5322 comments inside angle-bracket addresses. Attackers can supply recipients like a display name with a parenthesized comment in the domain, so

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-110870

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-110870

    Nodemailer from 3.0.0 before 10.0.13 contains an improper input validation vulnerability in its address parser that fails to strip RFC 5322 comments inside angle-bracket addresses. Attackers can supply recipients like a display name with a parenthesized comment in the domain, so

    nvd.nist.gov
  • Snyk Vulnerability DatabasePackage advisorySNYK-JAVA-ORGWEBJARSNPM-20952996

    Improper Adherence to Coding Standards

    security.snyk.io
  • Snyk Vulnerability DatabasePackage advisorySNYK-JS-NODEMAILER-20952995

    Improper Adherence to Coding Standards

    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.