VulnSocial

CVE-2026-121424

LOWCVSS 8.3 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-20

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-11-03: 111-03
Full discourse1 post
  • Upwind Security MDR@UpwindMDR

    🚨High - Nodemailer addressparser Flaws Enable Mail Redirection (CVE-2026-121424, CVE-2026-121425, CVE-2026-121426) Parsing bugs in nested comments, address groups & angle addresses let crafted email addresses bypass recipient allow lists and redirect mail to attacker-chosen recipients. 👉Affected: Nodemailer 3.0.0 - 10.1.3 | Upgrade to 10.1.4

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    380 followersView on X

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