---
cve: "CVE-2026-48846"
severity: "MEDIUM"
cvss: 6.5
epss: "41%"
vendor: "Roundcube"
kev: false
exploited: false
published: "2026-05-25 20:16:37"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T02:16:53+02:00"
---

# CVE-2026-48846

> 6.5 MEDIUM · 🧪 PoC

## Beschreibung

In Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1, the remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message, which may lead to information disclosure or access-control bypass.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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 | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- ea1798a6fbf060abcc0ba73b2435036bf8016a5a (Commit)
- d40ec266240f2456a52c24ef2848e18bbfb5c300 (Commit)

## Referenzen

- <https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1>
- <https://github.com/roundcube/roundcubemail/releases/tag/1.7.1>
- <https://github.com/roundcube/roundcubemail/commit/59cca80908a61e662c5f81741449e9aeb91e8abe>
- <https://github.com/roundcube/roundcubemail/releases/tag/1.6.16>
- <https://github.com/roundcube/roundcubemail/commit/852350486b88b35b8544e8a630fad89e99e2150a>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-48846) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_