---
cve: "CVE-2026-54433"
severity: "HIGH"
cvss: 7.2
epss: "31%"
vendor: "Roundcube"
kev: false
exploited: false
published: "2026-07-14 17:17:05"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T04:55:31+02:00"
---

# CVE-2026-54433

> 7.2 HIGH

## Beschreibung

In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, there is Stored Cross-Site Scripting (XSS) via a crafted plain-text email message. The attacker-controlled JavaScript executes within the victim's authenticated session simply by opening or previewing the message (zero-click).

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 5cdc6a48b40beabff7f0bf5d9035f4491e877e4c (Commit)
- a08bc8f59bbd28cd3d863479478127e35beb959d (Commit)

## Referenzen

- <https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-54433) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_