CVE-2026-48843
7.2
HIGH
CVSS 3.1
EPSS 0.30%
Description
Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. The issue stems from an insufficient fix for CVE-2026-35540.
How to fix CVE-2026-48843
To remediate CVE-2026-48843, upgrade the affected package to a fixed version below.
- Debian/roundcube—upgrade to 1.4.15+dfsg.1-1+deb11u9 or later
Is CVE-2026-48843 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.4.15+dfsg.1-1+deb11u9
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |