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.
History

Mon, 26 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


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

Type Values Removed Values Added
Weaknesses CWE-791
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 10.0.13 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.
Title Nodemailer before 10.0.13 Improper Input Validation via Angle-Bracket Address Comments
First Time appeared Nodemailer
Nodemailer nodemailer
Weaknesses CWE-20
CPEs cpe:2.3:a:nodemailer:nodemailer:*:*:*:*:*:*:*:*
Vendors & Products Nodemailer
Nodemailer nodemailer
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-10-14T22:52:58.787Z

Updated: 2026-10-26T15:20:53.532Z

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

Link: CVE-2026-110870

cve-icon Vulnrichment

Updated: 2026-10-26T15:20:26.192Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-14T23:17:28.813

Modified: 2026-10-26T16:17:11.983

Link: CVE-2026-110870

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-14T22:52:58Z

Links: CVE-2026-110870 - Bugzilla