---
cve: "CVE-2026-62644"
severity: "MEDIUM"
cvss: 6.4
epss: "26%"
vendor: "Roundcube"
kev: false
exploited: false
published: "2026-07-14 16:17:04"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T03:05:17+02:00"
---

# CVE-2026-62644

> 6.4 MEDIUM · 🧪 PoC

## Beschreibung

In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, the password plugin of the Roundcube Webmail was subject to username spoofing via session data, which could lead to account takeover.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Gering | warn |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| 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>
- <https://github.com/roundcube/roundcubemail/releases/tag/1.7.2>
- <https://github.com/roundcube/roundcubemail/commit/7414fef51cd2407d39faab99680763f10ed5231d>
- <https://github.com/roundcube/roundcubemail/commit/9a96c20d8c7c9135876b68bebd6960af3ee60923>
- <https://github.com/roundcube/roundcubemail/releases/tag/1.6.17>
- <https://github.com/roundcube/roundcubemail/commit/83150ce04d689a70f92d511bcae40adba8d55476>
- <https://github.com/roundcube/roundcubemail/commit/5cdc6a48b40beabff7f0bf5d9035f4491e877e4c>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-62644) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_