8.3

CVE-2026-121426: Nodemailer 3.0.0 before 10.1.4 Recipient Domain Confusion via addressparser

Awaiting analysis
Published 03-11-2026Last modified 03-11-2026

Vulnerability summary

CVE-2026-121426 is a high (CVSS 8.3) Improper Input Validation vulnerability in nodemailer.

Priority
Prioritisesevere

Severe, CVSS 8.3 (CVE.org); no exploitation reported by the 5 checked sources; EPSS not yet published

Source freshness unavailable

How is this decided?
CVSS score
8.3/10
010
High · v4.0 (CVE.org)
EPSS scoreNot scoredRisk metrics not yet published.
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 03-11-2026
    PublishedVulnerability first disclosed.

Description

Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that ends an angle-addr at a '>' inside a quoted local part, comment or domain literal. Attackers can submit addresses that validate as an allowed domain but are delivered to an attacker-controlled domain, bypassing recipient allow lists and disclosing message content.

CVSS metrics

4 scores · 2 sources · 2 versions

EPSS trend

No EPSS score has been published for this record yet.

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Nodemailer1 product

1 vendor · 1 product

References

2 links