Bug 2454726 (CVE-2026-35544) - CVE-2026-35544 roundcubemail: Roundcube Webmail: Security mitigation bypass via insufficient CSS sanitization
Summary: CVE-2026-35544 roundcubemail: Roundcube Webmail: Security mitigation bypass v...
Keywords:
Status: NEW
Alias: CVE-2026-35544
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2454792 2454793
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-03 05:02 UTC by OSIDB Bzimport
Modified: 2026-04-03 15:16 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-04-03 05:02:17 UTC 
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.
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