CVE-2026-121426

🎯 CVE-2026-121426 🧪 PoC 🇪🇺 EUVD

💬 0 Diskussion 📄 .md Alle CVEs anzeigen ✕

CVE-2026-121426 | 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.

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.

Klassifikation & Betroffenheit:

CWE-20 nodemailer nodemailer 3.0.0 <10.1.4

Improper Input Validation 🎯 High

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

🛡️ Empfohlene Mitigation: Consider using language-theoretic security (LangSec) techniques that characterize inputs using a formal language and build "recognizers" for that language. This effectively requires parsing to be a distinct layer that effectively enforces a boundary between raw input and internal data representations, instead of allowi…

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-10 · Buffer Overflow via Environment Variable… (High) CAPEC-13 · Subverting Environment Variable Values (Very High) CAPEC-101 · Server Side Include (SSI) Injection (High) CAPEC-104 · Cross Zone Scripting (High) CAPEC-108 · Command Line Execution through SQL Injec… (Very High) CAPEC-109 · Object Relational Mapping Injection (High) CAPEC-110 · SQL Injection through SOAP Parameter Tam… (Very High) CAPEC-120 · Double Encoding (Medium)

🎯 ATT&CK-Techniken (Kill-Chain-Verhalten):

T1562.003 · Impair Defenses:Impair Command His… T1574.006 · Hijack Execution Flow:Dynamic Link… T1574.007 · Hijack Execution Flow:Path Interce…

🧩 Ähnliche Schwachstellen (Hersteller/Klasse/Score-Band):

CVE-2024-33066 9.8 CVE-2024-46946 9.8 CVE-2024-44808 9.8 CVE-2024-44809 9.8 CVE-2024-8073 9.8

🩹 Patch verfügbar (OSV):

🩹 2a7e95294d2a4995a19e9009379daf650cdc80e6 (Commit)

📰 Eigene Berichterstattung: ➔ CVE-2026-121426 | Nodemailer up to 10.1.3 addressparser input validation (Nessus

📚 Referenzen & Quellen:

🇪🇺 Original-Eintrag (ENISA EUVD) 🇺🇸 NVD-Eintrag

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 11/2026

Heute 09.11.

CVSS-Vektor-Analyse: 8.3

AV · Angriffsvektor Netzwerk

AC · Komplexität Hoch

PR · Privilegien Keine

UI · Interaktion Keine

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

CNA-Bewertung (VulnCheck): 8.3 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA…

Veröffentlicht:03.11.2026

Aktualisiert:07.11.2026 03:17

Assigner (CNA):VulnCheck

EUVD-ID:EUVD-2026-115958

Quellen: 🇪🇺 EUVD-Datenbank (ENISA) + 🇺🇸 NVD-Anreicherung · 24-h-Cache

CWE-20 ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

Tier	CVEs	Anteil
≥90 %	785	0,2 %
≥50 %	3.559	0,9 %
≥10 %	13.139	3,2 %
<10 %	396.072	95,8 %

Tier

CVEs

Anteil

≥90 %

785

0,2 %

≥50 %

3.559

0,9 %

≥10 %

13.139

3,2 %

<10 %

396.072

95,8 %

8.3 HIGH

EPSS

0.2%

CVE-2026-121426 🌐 Netzwerk (Remote) 🔓 Keine Authentifizierung nötig

nodemailer

CVE-2026-121426 | 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.

CWE-20 ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

vor 5 Tagen ↻ vor 2 Tagen

🛡️ Details ➔

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