---
cve: "CVE-2026-26079"
severity: "MEDIUM"
cvss: 4.7
epss: "29%"
vendor: "Roundcube"
kev: false
exploited: false
published: "2026-02-11 05:16:28"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T09:18:51+02:00"
---

# CVE-2026-26079

> 4.7 MEDIUM · 🧪 PoC

## Beschreibung

Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13 allows Cascading Style Sheets (CSS) injection, e.g., because comments are mishandled.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 8b7553e6f5a4bca02b8d63107cc9dbe9b98d4f90 (Commit)
- 51109fe87c80853416baf8c9408a8d2e90bdac0e (Commit)

## Referenzen

- <https://roundcube.net/news/2026/02/08/security-updates-1.6.13-and-1.5.13>
- <https://github.com/roundcube/roundcubemail/releases/tag/1.6.13>
- <https://github.com/roundcube/roundcubemail/commit/1f4c3a5af5033747f9685a8a395dbd8228d19816>
- <https://github.com/roundcube/roundcubemail/commit/2b5625f1d2ef7e050fd1ae481b2a52dc35466447>
- <https://github.com/roundcube/roundcubemail/commit/53d75d5dfebef235a344d476b900c20c12d52b01>
- <https://github.com/roundcube/roundcubemail/releases/tag/1.5.13>
- <https://github.com/roundcube/roundcubemail/commit/bf89cbaa5897d8ad62e8057d9a3f6babb90b7954>
- <https://github.com/roundcube/roundcubemail/commit/5a3315cce587e0be58335d11ff9a5571c90494a5>
- <https://github.com/roundcube/roundcubemail/commit/c15f5dbf093a497e19a749b20e7f8fb5a9c24cde>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-26079) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_