CVE-2026-35544

Published April 3rd, 2026

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CVSS v3

5.3

MEDIUM

CVSS v2

N/A

Affected

PROJECT

Description

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to a fixed-position mitigation bypass via the use of !important.

roundcube/roundcubemail

The Roundcube Webmail suite

GitHub