CVE-2026-125755

high

Description

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.

References

https://www.vulncheck.com/advisories/nodemailer-3.0.0-before-10.4.1-recipient-allow-list-bypass-via-addressparser

https://github.com/nodemailer/nodemailer/security/advisories/GHSA-3q53-mvfw-q9v8

https://github.com/nodemailer/nodemailer/releases/tag/v10.4.1

https://github.com/nodemailer/nodemailer/commit/c2b9c41bb81b2294ebadd294ad15ff035a17d0a5

https://github.com/nodemailer/nodemailer/blob/3b5cf1eec32c81f287870c8a1c9c09640062cfd5/src/addressparser/index.ts#L330-L345

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-121238

Details

Source: Mitre, NVD

Published: 2026-11-10

Updated: 2026-11-13

Risk Information

CVSS v2

Base Score: 6.1

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

Severity: Medium

CVSS v4

Base Score: 8.3

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00257