---
cve: "CVE-2026-92598"
severity: "HIGH"
cvss: 8.3
epss: "0.3%"
vendor: "nodemailer"
kev: false
exploited: false
published: "2026-09-16 22:18:30"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T00:31:17+02:00"
---

# CVE-2026-92598

> 8.3 HIGH · 🧪 PoC

## Beschreibung

Nodemailer before 9.1.0 fails to apply UTS-46 normalization when encoding international domain names, causing the domain resolver to compute a different Punycode A-label than standards-compliant parsers. Attackers can craft recipient addresses with invisible characters or compatibility mappings that pass domain allow-list checks but are delivered to attacker-controlled domains via SMTP.

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- efd6e29c10c6e0c25c57bd2f2a71302838235a4f (Commit)
- 259c32d (Commit)

## Referenzen

- <https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wmmp-3585-3rmp>
- <https://github.com/nodemailer/nodemailer/commit/259c32d>
- <https://github.com/nodemailer/nodemailer/commit/b212ac4>
- <https://www.vulncheck.com/advisories/nodemailer-before-9.1.0-idn-punycode-domain-allow-list-bypass>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-92598) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_