8.3

CVE-2026-121424: Nodemailer 3.0.0 before 10.1.4 Address Parsing Bypass via Nested Comments

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

Vulnerability summary

CVE-2026-121424 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.
  2. 03-11-2026
    Last modifiedVulnerability information updated.

Description

Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that allows remote attackers to redirect recipients by ending nested RFC 5322 comments at the first closing parenthesis. Attackers can submit addresses whose nested comment hides an attacker address, bypassing conformant validators and recipient allow lists to receive mail or spoof senders in mailparser.

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