CVE-2026-125755
Nodemailer 3.0.0 before 10.4.1 Recipient Allow-List Bypass via addressparser
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
Nodemailer 3.0.0 before 10.4.1 contains an address parsing flaw in addressparser that truncates domains at folding whitespace or comments before a dot, allowing attackers to bypass recipient domain restrictions. Attackers can submit crafted to, cc, bcc or replyTo addresses that pass RFC 5322 domain checks but deliver mail to an attacker-chosen address under the application's sender identity.
| CWE | CWE-436 |
| Vendor | nodemailer |
| Product | nodemailer |
| Published | Nov 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None
Affected Versions
nodemailer / nodemailer
3.0.0 < 10.4.1
References
github.com: https://github.com/nodemailer/nodemailer/security/advisories/GHSA-3q53-mvfw-q9v8 github.com: https://github.com/nodemailer/nodemailer/commit/c2b9c41bb81b2294ebadd294ad15ff035a17d0a5 github.com: https://github.com/nodemailer/nodemailer/releases/tag/v10.4.1 github.com: https://github.com/nodemailer/nodemailer/blob/3b5cf1eec32c81f287870c8a1c9c09640062cfd5/src/addressparser/index.ts#L330-L345 vulncheck.com: https://www.vulncheck.com/advisories/nodemailer-3.0.0-before-10.4.1-recipient-allow-list-bypass-via-addressparser
Credits
Ismail Can Guner