Vulnerability DatabaseCVE-2026-110870
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CVE-2026-110870
Published:October 14, 2026
Updated:October 20, 2026
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.
Affected Packages
nodemailer (NPM):
Affected version(s) >=10.0.0 <10.0.13
Fix Suggestion:
Update to version 10.0.13
Related Resources (4)
https://www.vulncheck.com/advisories/nodemailer-before-10.0.13-improper-input-validation-via-angle-bracket-address-comments
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110870.json
https://github.com/nodemailer/nodemailer/security/advisories/GHSA-g73g-hqqh-jr95
https://nvd.nist.gov/vuln/detail/CVE-2026-110870
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CVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Input Validation
CWE-20
EPSS
Base Score:
0.22