All vulnerabilities
CVE-2026-110870GHSA-g73g-hqqh-jr95

Nodemailer before 10.0.13 Improper Input Validation via Angle-Bracket Address Comments

nodemailer nodemailer
Open in ThreatlineRecord JSON
CVSS
6.9Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.22%Chance of exploitation activity in the next 30 days, higher than 11% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in10.0.13Fixed versionCVE List
Published14 Oct 2026Updated 14 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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.

Text from CVE List

Affected versions 2

  • nodemaileraffected: 3.0.0 before 10.0.13CVE List
  • nodemailerunaffected: 10.0.13CVE List

References 2